Reply to M-Audio X-Session Pro on Multiple Computers

Hey guys!
I have an M-Audio X Session Pro that I use as a nice MIDI interface. I would like to be able to use this on multiple computers however.
I'm trying to control Traktor on a PC with some of the controls, but have others mapped to Traktor running on a Mac.
I know this is possible with some software that transmits MIDI data over LAN/Ethernet.
I'm hoping some of you guys would know, and be able to give me any pointers.
I've found some software, but it's mostly share-ware, and I'm not sure if it will do what I'm looking for or not. I also can't help noticing in the "Audio MIDI Setup" utility with Mac, there is some kind of networking option... although I'm trying to network another PC.

Thanks for your help,
Ctcwired