ArtNet/sACN input pass through to fixtures

I'm wanting to extend the bounds of my video content into my lighting rig.

My approach is to use Resolume Arena to map dummy DMX fixtures onto the video and send that out via ArtNet to the hog. The hog would then need to take the RGB values from these dummy fixtures and pass that along into the RGB values of my actual fixtures.

Two questions:
1. is there any way to route DMX input data to specific fixture channels (rgb)?

2. Is there a way to turn that feature off if I want to control color from the console?