public boolean isLoginRestrictedToNickname() {
        return loginRestrictedToNickname;
    }
Returns true if registered users can only join the room using their registered nickname. By
default, registered users can join the room using any nickname. A not_acceptable error
will be returned if the user tries to join the room with a nickname different from the
reserved nickname.

@return true if registered users can only join the room using their registered nickname.
xmppserver/src/main/java/org/jivesoftware/openfire/muc/MUCRoom.java