It currently only supports a stereo feed.
This request is already on the long list of things people would like.
I'm sure the dev's are prioritizing things as they come in.
I would think fixing bugs and allowing you to use a piece of software that doesn't crash would be a little higher up on their list atm
Do a quick search and you'll find a few other posts requesting this.
Are you just wanting to use the inputs for FX or for triggering as well?
You might be able to use TD for FX and syphon those in for the time being?