Associating "listeners" and "viewers"

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Is there a way to associate an "unknown" listener with a "viewer"
name? This would make it easier for the moderator to selectively mute
and unmute lines when someone raises their hand. 

This could be a manual operation by a participant who must manually "link"
their voice line -- possibly by entering a series of keystrokes on the
voice call.

Original issue reported on code.google.com by s.mue...@gmail.com on 5 Nov 2007 at 7:28