Collaboration session communications methods, methods of configuring a plurality of collaboration sessions, communications methods, collaboration infrastructures, and communications systems are described. According to one aspect, a collaboration session communications method includes coupling a plurality of groups of participants with a collaboration infrastructure, providing a plurality of communications rules to the collaboration infrastructure to control communications of data within a collaboration session, outputting a communication from a first one of the groups for communication to a second one of the groups, receiving the communication within the collaboration infrastructure after the providing, identifying the communication as originating from the first one of the groups and intended for communication to the second one of the groups, and forwarding the communication to a third one of the groups using the collaboration infrastructure and responsive to the identifying and in accordance with one of the communications rules.