Abstract: Systems and methods for providing peer-to-peer voice, audio, video, text and/or multimedia communications between subscriber hosts over a private packet-switched network communicating data pursuant to a first protocol are provided. Routing data is distributed to a plurality of voice, audio, video, text and/or multimedia-communication hosts coupled to the private network sufficient to enable peer-to-peer data communications therebetween pursuant to a second protocol, each of the plurality of voice, audio, video, text and/or multimedia-communication hosts having a unique second protocol address for communication pursuant to the second protocol. A second protocol address is communicated by means of a user identifier translation application running on a host coupled with the private network to a respective one of the plurality of voice, audio, video, text and/or multimedia communication hosts in response to a user identifier identifying a system user.