This what I do, In LW I set the address type to the Universe/Address format (e.g. 1/203) on both the drop down menu and the VW exchange box. Set the Dimming & Control dropdown menu up with a letter for each universe as personally I prefer that format.
Attached is a picture of how Vision sees the VW information. The Vision info shown is what it's picked up from the VW drawing. So in VW I need to put the DMX address in the Dimmer box and Vision sees this as 'Channel', universe has to be numeric though as I use a letter prefix on my VW address this doesn't matter, channel in VW is shown as head number in the Vision box.
Max