https://bugs.winehq.org/show_bug.cgi?id=25532
--- Comment #7 from C.W. Betts computers57@hotmail.com --- My attempt at running iTunes is stymied when I tried to run the recent version on Ubuntu 14.4 (and wine updates provided by the Wine PPA) due to graphical glitches (which may be due to my GPU, a GMA 945), and with the old version just crashing outright.
So I can't confirm or deny that iTunes can find shared music libraries.
I think this issue is due to Bonjour installed via iTunes under Wine not being able to work due to the host OS's implementation of mdns hogging the port.