Yes. The filter as shown is intended only for pee. There's a brochure about the NanoGuard filter attached here. I looked for a 5nm membrane because the NIH now says pathogens have been detected at 15nm.
Also considering adding biochar to the area below the filter.
What is the pee and poop issue you are trying to solve? A simple humanure style toilet takes care of any issues with no separation of the two, no filters, nothing complicated to deal with. Is there some kind of code issue in your area that you are trying to solve?