Paste does work for Mac--but you have to use the control key instead of the apple key while you're in Limewire. (WHICH IS BLOODY ANNOYING AND SHOULD BE FIXED.)

If you want to copy something from outside of Limewire and paste it into LW, you have to hit apple-c and then control-v.

If you want to copy from Limewire and paste it into anything else, it's control-c and then apple-v.