Hog4PC via Artnet with Widgets Question

I don't own any DMX widgets, so I was curious about the whole Artnet out on Hog4PC. I understand you have to have a Hog widget inline. Can someone elaborate as to what excactly you get? If you have a single DMX widget and a DP2K, does that mean you can only use one DMX port via Artnet on the DP2K? Does the DMX port via Artnet mirror the DMX widget or can you actually expand more universes of DMX?