Oh, I see, thank you. I thought your previous comment was a workaround for screen space traces too (but I missunderstood it). So, currently, no workaround to 100% avoid emissives illuminating, as screen traces will be still there (unless you make huge tradeoff like disabling lumen screen traces, or lowering the max ray intensities too much).
I hope you can test your idea (we could set max emissive limit by substracting emissive value from the final pixel color) and make it work succesfully!