lol it means there's someone using the same lan as you & they are also sharing their iTunes library. That's all. You can play their songs & vice versa but you can't copy them. If you wish to disable this, go to iTunes preferences>Sharing & untick Look for shared music. If you don't want them to see your playlist then also untick Share my music. Oh hold on you're refering to LW playlist, um if you can guard it with a password within LW. I think that's the way to go about it.