Haven't used it but I would say it would be compatible. Audition doesn't care what input on your computer the soundcard comes in on (PCI slot, firewire,usb). It just treats it as a normal soundcard.
So if windows displays it in the device manager as a soundcard then you'll be able to use it with adobe audition.
All adobe sees is the inputs and outputs not what connection is made from the soundcard to the computer