I feel like I kind of derailed this thread, but it didn't have "Recipe" in the title, and it seemed like it could be a discussion thread. Anyway, I'm glad it's officially discussion and I don't feel as guilty.
When you read labels on prepackaged food, I've seen whey and lactose, but I have no idea if you can buy those separately to cook with. (Obviously, I'm not looking either.) So, I think "technically" there is more than ghee that is casein-free but not dairy-free. But "practically," as far as baking goes, probably not.

And now, having written that, I keep thinking I read that some soy yogurt and whatnot contain dairy. I've never bothered looking into "fake" cheeses and yogurts, so I don't know. What kind of dairy do they use, if they use dairy? Is it casein? Or whey? Or ??? In that case, I can see a recipe calling for a yogurt substitute and meeting casein-free, but not dairy-free. But, as I said, I don't know.