If we made a demo that was submitted to Lewd Jam, can we submit the complete game to this?

Ehh, that seems iffy; I guess it depends on how far along the demo is and how much work is left to make it a full game.

Can we enter more than one lewd-themed jam (thinking about doing lewd jam extended). Also, how nood is too nood and can a game have ponies (or anthros)?

Might join two jams and do something pony related. I'd like to do something where the main character has to defeat some villains, including a p-dough-bear type baddie, but not sure if I can have younger characters in a game where nothing wears clothes. I'd guess it could be fine if you were making a game about anatomically correct dogs being dogs and having puppies, but does sentience beg crimes? Might do it anyway and FtP. I mean, your character is going to get a nasty GAME OVER if you try certain "activities", I mean really nasty, and no payoff either.

Last year's Strawberry Jam had one entry that was basically just a naked erect dude (photo, not art), so, I don't think "too nood" is really a thing.  :)

And my own game last year was about a fox so absolutely go nuts with the animal people.

Nothing wrong with submitting to multiple jams imo.

I was originally going to do a lewd dating game with a town and bosses, but I had a better Idea. Unfortunately I might not be able to make this jam. My internet connection is spotty at best, the models are not finished, and I'm having problems with the navigation meshes. There are other jams I'm entered in, but I still have a ton to do.