If none of these apply, you need to seriously question why you would allow access from the internet to a service. There are ways and means to specify different access rights depending on where a user accesses WinGate from. You can either create duplicate services bound to the different interfaces with different policies per service, or you can do it with a single service, with location based policies. E.g POP3 service using service specific rules. The second can connect from anywhere, but is restricted by request - say only allow connections to certain servers or ports.
More help is at hand.