private void setRoleAddress(JID jid) {
        occupantJID = jid;
        // Set the new sender of the user presence in the room
        synchronized (this) {
            presence.setFrom(jid);
            cacheSize = -1;
        }
    }
Returns true if the user is one that is in the room as a result of that user being in another room that is
federated with this room, through the FMUC protocol

@return true if this user is a user on a remote MUC room that is federated with this chatroom.
xmppserver/src/main/java/org/jivesoftware/openfire/muc/MUCOccupant.java