Limewire does not have an easy way to tell the difference between copyrighted and non-copyrighted material. (In fact Limewire has NO way to tell the difference.)

Determining if a file is copyrighted is an exercise in common sense. Chances are if you download a song that you know the artist/record label is trying to sell, then you are downloading a copyrighted song.

Of course there are exceptions to this rule, but they are certainly not the norm.

Jonathan