public boolean wantsStanzasSentBy( @Nonnull final MUCOccupant sender ) {
            // Only send data if the sender is not an entity on this remote FMUC node, or the remote FMUC node itself.
            return sender.getReportedFmucAddress() == null || (!occupants.contains( sender.getReportedFmucAddress() ) && !peer.equals( sender.getReportedFmucAddress()) );
        }
The addresses of the occupants of the MUC that are joined through this FMUC node.
xmppserver/src/main/java/org/jivesoftware/openfire/muc/spi/FMUCHandler.java