You can sort them by clicking on the title bar as in "Name" but within Limewire there is no other feature available to allow segregating the artist name from the title etc.. Within Limewire you are at the mercy of the person sharing the file although you can re-name the file once it is in your library. There are many programs out there that you can use to manage and play your MP3 library that will allow you the flexibility to sort by Artist, Title, Album etc. Some of these are:

Music Match Jukebox
Win Amp
Real One Player
Several on Downlaod.com