An example method can include establishing a session involving a first end user, the first end user is included in a virtual talk group, which includes at least one other end user. A media source is provided for the session. The method also includes initiating a request for a second end user to join the session, the second end user is added to the virtual talk group. A mobile device being used by the first end user controls which data from the media source is to be sent to the second user during the session. An internet protocol (IP) address associated with the media source is withheld from communications sent to the second user. In more detailed embodiments, a control channel can be established between the mobile device and a server, the control channel managing data being sent to end users in the virtual talk group.