You can
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use multiple chat rooms How do you create separate chat rooms? - #8 by LazyKillerKing to allow private conversations between specific individuals perhaps
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do not append Label3 to the chat (it contains the account url's or usenames), you don't have to expose them. The ListViewer contains the usenames because your code tells it to ; you do not have to do that. You can either not include that information or use screen names for chat participants.