https://about.furrynetwork.com/acceptable-upload-policy/ If you would read their AUP it says-

"No photographs of a pornographic nature

• Tasteful nudity, sex toys, or suggestive themes are allowed"

Murrsuits with people in them would fall under nudity and murrsuits without them would be under 'suggestive themes'.

So no, murrsuits are more than likely not allowed.