Here is the quote from the poll that makes me think this is possible.
"GS have already made it possible to do this in the Profile Editor in ArchiCAD 18 so they obviously know how to code a polyline with every edge customisable. You can turn each edge on or off and also change the pen individually for each edge. This just needs to be brought across to the general fill tool.
Nick DiPietro
Cad Manager/Monkey
Autodesk Expert Elite
Archicad 26 Solo USA
https://farkasassociates.com/