Instead of using the virtual voice over IP, you can start a direct and private chat with any other active user.
In a scene, to a start a private chat, walk/move to any other person's avatar so you can see them on your screen.
Once they're in your screen view, CLICK or TAP on the person you would like to interact with (Red Circle)
Once CLICKED or TAPPED, the Pop Up menu will show
To start the private chat, CLICK "Start private chat" button, Chat will pop up. Close the pop up to start chat (Yellow Circle)
You may have a chat with any selected person or with everyone in the scene using the chat box on the lower left corner (Yellow Circle)