Have you tried using an network switch?
What is the 192.x.x.x address? Wired or Wireless?
on MBP
Resolume OFF
Wireless OFF
Artnet (ethernet) ON
Now, start Resolume and attempt artnet. Then you can turn wireless back on
Try using DMX Workshop to scan the network just in case
http://www.artisticlicence.com/index.ph ... &order_id=
Programs that use Artnet/Pathport/etc like to use NET0 as the interface for communication, which tend to be wireless on laptops, so you have to turn it off so it will use NET1 (wired port)