When you load up keyclone on each computer, it should list an IP address in the title bar of the window (192.168.1.101:1320)

To connect, open keyclone on both computers, goto whatever computer your "main" will be on and type the OTHER computers IP into the box next to the "connect" button including the port. Hit connect, and they should both be connected. Just make sure you "add" each WoW window using keyclone.