This is my current understanding:
If you have a Pixelnet dongle as the second network device in xLights, then xLights puts anything using AuxA out to the Pixelnet dongle.
First xLights network device is sent the Regular Network
Second xLights network device is the Aux A Network (aka, Network="1")
Third xLights network device is the Aux B Network (aka, Network="2")
In LOR, with some effort, you can create 3840 channels in the Aux A network (Unit01, 01 up to UnitF0, 16) hex numbering
But xLights expects 16 channels per Unit for its formula.
Since LOR won't name a Unit ID above F0, you therefore can't use all 4096 Pixelnet channels. (at least, I haven't found a way)