A method of controlling user sessions at an IP Connectivity Access Network, hereinafter IP-CAN sessions, for a plurality of users of a Policy and Charging Control, hereinafter PCC, architecture through a unique session maintained between a Policy and Charging control Rules Function, hereinafter PCRF, and a Policy and Charging Enforcement Function, hereinafter PCEF, the method comprising the steps of: provisioning (S-03) a number of user community profiles at a user database system, wherein each user community profile contains PCC-related information applicable to a plurality of users; associating (S-05) at the user database system each user community profile with a group identifier that identifies (S-07) user identifiers of the plurality of users to which the user community profile is applicable, wherein the group identifier is a regular expression comprising an indication of a range of users to identify the plurality of users; upon establishment (S-100) of an IP-CAN session from a first user of the plurality of users, a PCEF establishing (S-105, S-325) a session with a PCRF and requesting (S-105) PCC rules for the IP-CAN session by providing an identifier of the first user; upon request (S-10, S-330) from a PCRF of a user profile for a user identified by the identifier of the first user, the user database system determining (S-07) the group identifier that identifies the identifier of the first user, and providing (S-12, S-14, S-335) the group identifier and the user community profile associated with the group identifier to the PCRF; generating (S-110, S-115) at the PCRF community PCC rules corresponding to the user community profile and submitting (S-120) the community PCC rules and the group identifier to the PCEF; and at the PCEF, associating the group identifier (S-130) with the community PCC rules and installing (S-125) the community PCC rules to be applied (S-135, S-155) for the first user and all subsequent users identified by the group identifier. provisioning (S-03) a number of user community profiles at a user database system, wherein each user community profile contains PCC-related information applicable to a plurality of users; associating (S-05) at the user database system each user community profile with a group identifier that identifies (S-07) user identifiers of the plurality of users to which the user community profile is applicable, wherein the group identifier is a regular expression comprising an indication of a range of users to identify the plurality of users; upon establishment (S-100) of an IP-CAN session from a first user of the plurality of users, a PCEF establishing (S-105, S-325) a session with a PCRF and requesting (S-105) PCC rules for the IP-CAN session by providing an identifier of the first user; upon request (S-10, S-330) from a PCRF of a user profile for a user identified by the identifier of the first user, the user database system determining (S-07) the group identifier that identifies the identifier of the first user, and providing (S-12, S-14, S-335) the group identifier and the user community profile associated with the group identifier to the PCRF; generating (S-110, S-115) at the PCRF community PCC rules corresponding to the user community profile and submitting (S-120) the community PCC rules and the group identifier to the PCEF; and at the PCEF, associating the group identifier (S-130) with the community PCC rules and installing (S-125) the community PCC rules to be applied (S-135, S-155) for the first user and all subsequent users identified by the group identifier.