I have it working for me, but I only have one PC running LimeWire.

I also have the Advanced / Port Forwarding option working so that I can get inbound connections, as well as Push requests.

I had to update the firmware, though, before the port forwarding worked properly. I am now on firmware v1.37 (there's a more recent one, too).

If you want more than one PC, you should still do port forwarding but you should set each PC to use a different port number (not the default 6346 or whatever). Then forward that port to the correct internal IP address.

Also, I have an ADSL line with a dynamic IP address. I manually do the Force IP Address setting in LimeWire but every week or so I have to fix it when they change my outside IP.