A quick and dirty way would be to make the basic footprint (pads only, no copper areas), then add the copper shapes after the part is instantiated, then associate the coppers with their nets. If you have multiple copies of this part in the design, turn the copper areas into a reuse to duplicate it. If you need those copper areas in the library footprint, you should be able to make the copper areas in the decal editor. You may have a problem associating the coppers with their respective nets in the decal since there are no nets defined yet. I'd go with the first option.