not through itunes, but u can use this program called "myTunes Redux" it opens up and shows all the other shared libraries and it'll let you d/l whatever songs u want from them as along as u can access the library (password protect, etc.).
one of the broads here at work said that the person whos library has the music i want, would have to send it to me....but im not gonna ask, so ill just continue listening from the shard librarys