TER will give the joint review it's own profile.

I've done both.

I noticed some reviews include both ladies in one review when reviewing a threesome.  Is that required, instead of reviewing them separately?   What about orgy events where 3 or more providers are hosting a meeting for several hobbyists?  Does that have to include all ladies encountered in one review or can a reviewer do one at a time?

I think it's about the 'session'. The experience is completely different if you spend time with a lady individually than with two at the same time. The added chemistry just creates a whole new situation. Hence, I don't think it's fair to write separate reviews, but that's my humble opinion.