Probably not. You could try changing to a higher port, one in the range of 49152-65535. You'd need to change LW's listening port (tools > options > advanced > firewall config), ports allowed within a software firewall & also any port numbers forwarded through a modem/router.
No guarantees that this would help, though.
Check out the thread below too, you might find some useful info
http://www.gnutellaforums.com/showth...threadid=32882