Finally, you can close specific rooms by adding them to groups that require a group key and protecting pages that specify that group key in their applet tag with a secure realm defined in the Web server. Then you simply add all of the defined rooms to that group. Finally, make sure that page is protected by a security realm that only allows authorized administrators to access that page via the Web. Then you can monitor and move between all of the rooms without concern for which group they belong to. Specifically, they are designed to host a large viewing audience watching a conversation between a few individuals.
Normal users monitor the chat session by joining the room.
The moderator can then repeat their question.