Well, I do prefer to keep the forum as kid friendly as possible, so I would say use your judgment on the kind of art that is posted. I don't really see anything wrong with girls in lingerie...female superheroes often wear very sexy outfits. However, if they're in clearly suggestive posses, showing nips, or there is a gratuitous amount of focus on their boobs, I'd say it might be a bit much.
Feel free to post, and if I don't like it, I will delete it and ban you forever. Just kidding. I'll let you know if I think it's too offensive. But otherwise I support strong, sexy female characters.