In Leopard this was not a problem. When you first started Limewire in Leopard it would ask if you would like to "allow" or "deny" connections if you had the firewall turned on. Then based on your choice a rule would be created in the Leopard firewall. You could also edit or create the rules in the firewall later if needed.

Snow Leopards firewall basically functions the same way accept the rule is ignored and keeps asking for permission to allow Limewire to accept connections.

There maybe many Snow Leopard users not having this issue since the operating system installs with the firewall turned off by default.

I am not sure if this is a factor or not, but Limewire v5.4.6 installs the application in 32 bit mode by default. This can be switched later, but I wonder if this causes a problem during the install.