Discover the Address of Additional Devices?
 

It's possible to use the gfxutil from the Netkas forums in the following manner to discover the address of certain hardware that is connected to computer:-

'gfxutil -f device'

This is also possible with the ioreg command but I don't remember the command off the top of my head.

My question is this. If I have two network interfaces, how do I use this command to discover the address of the second interface? When I try the command, I only get one of my devices to show.