A computing system, comprising: a logic machine; and a storage machine holding instructions executable by the logic machine to: receive via a network, for each of a plurality of head-mounted display devices, vantage point data; determine, for each of the plurality of head-mounted display devices, whether one or more other head-mounted display devices are within a vantage point scope of that head-mounted display device, the vantage point scope being based on and associated with the vantage point data of that head-mounted display device and one or more network conditions of the network, wherein the one or more network conditions include bandwidth usage and/or throughput; and in response to a reduced bandwidth and/or a reduced throughput of the network, selectively constrain, for each one of one or more head-mounted display devices, delivery of communication data from that one of the one or more head-mounted display devices to one or more of a plurality of other head-mounted display devices via the network, such a selective constraint being based on whether that one of the one or more head-mounted display devices is within the vantage point scope of one or more of the plurality of other head-mounted display devices, in which case, the delivery of communication data from that one of the one or more head-mounted display devices is permitted, whereas if it is determined that that one of the one or more head-mounted display devices is not within the vantage point scope of one or more of the plurality of other head-mounted display devices, the delivery of communication data from that one of the one or more head-mounted display devices is not permitted. a logic machine; and a storage machine holding instructions executable by the logic machine to: receive via a network, for each of a plurality of head-mounted display devices, vantage point data; determine, for each of the plurality of head-mounted display devices, whether one or more other head-mounted display devices are within a vantage point scope of that head-mounted display device, the vantage point scope being based on and associated with the vantage point data of that head-mounted display device and one or more network conditions of the network, wherein the one or more network conditions include bandwidth usage and/or throughput; and in response to a reduced bandwidth and/or a reduced throughput of the network, selectively constrain, for each one of one or more head-mounted display devices, delivery of communication data from that one of the one or more head-mounted display devices to one or more of a plurality of other head-mounted display devices via the network, such a selective constraint being based on whether that one of the one or more head-mounted display devices is within the vantage point scope of one or more of the plurality of other head-mounted display devices, in which case, the delivery of communication data from that one of the one or more head-mounted display devices is permitted, whereas if it is determined that that one of the one or more head-mounted display devices is not within the vantage point scope of one or more of the plurality of other head-mounted display devices, the delivery of communication data from that one of the one or more head-mounted display devices is not permitted. receive via a network, for each of a plurality of head-mounted display devices, vantage point data; determine, for each of the plurality of head-mounted display devices, whether one or more other head-mounted display devices are within a vantage point scope of that head-mounted display device, the vantage point scope being based on and associated with the vantage point data of that head-mounted display device and one or more network conditions of the network, wherein the one or more network conditions include bandwidth usage and/or throughput; and in response to a reduced bandwidth and/or a reduced throughput of the network, selectively constrain, for each one of one or more head-mounted display devices, delivery of communication data from that one of the one or more head-mounted display devices to one or more of a plurality of other head-mounted display devices via the network, such a selective constraint being based on whether that one of the one or more head-mounted display devices is within the vantage point scope of one or more of the plurality of other head-mounted display devices, in which case, the delivery of communication data from that one of the one or more head-mounted display devices is permitted, whereas if it is determined that that one of the one or more head-mounted display devices is not within the vantage point scope of one or more of the plurality of other head-mounted display devices, the delivery of communication data from that one of the one or more head-mounted display devices is not permitted.