yep... I sometimes use an IWB holster, but I don't wear it inside the pants. i wear it outside the pants, but inside the belt. It works well if I need to wear certain pairs of dress trousers which are snug. It also works well if I need to wear a standard dress belt instead of a real gun belt.
I go the idea from a galco holster that was designed for this kind of carry. I don't recall the name.
This kind of carry is not more concealable than a good pancake belt holster combined with a good stiff gun belt. But sometimes it is the best option.