Gnutella is p2p, from person to person. This forum is a typical forum site.

Different accounts by the sounds of things. Try changing the 'Listening port' -> LW's menu bar -> Tools -> Options -> Advanced -> Firewalls. Change it to something between 49152 - 65535.

Modems/routers are governed by ip control usually. Each account on the computer will have a different ip address. Only one port number can be used by one ip (two accounts cannot use same port number ... for listening at least.)

Check these options also: http://www.gnutellaforums.com/connec...t-connect.html