Your UPnP settings will find a port that it thinks are not being blocked & this may change from time to time of use. Personally I nowadays don't even use my OSX firewall for LW. I very rarely have my OSX firewall turned on. Only when surfing suspicious sites. Simply enter the port numbers as recommended in your OSX firewall, unless advised otherwise.

More details would be helpful for us to see if we can find a solution for you; System details - help us to help you (click on blue link). Otherwise it's like trying to get a doctor to make you better without actually seeing them.

As for pro support, Lime Wire » Support