Yes.
I also set my OSX Network Preferences to a "Manually" and give it a fixed IP (192.168.*.2) so that the router--LinkSys here--doesn't change my private IP.

On the LinkSys, The settings for allowing incoming to the private IP:PORT 6346 TCP/UDP are under Advanced->Port Forwarding.

Then in the LW Preferences->Advanced->Port and Firewall settings also use the same port (6346).

You'll know it works when you can scroll through the LW Prefs->Bug Reports->View Example and see the line "Accept incominng this session=True"