I don't see why you couldn't LST an autoflower plant, although there shouldn't be MUCH need for it since they tent to stay so small anyway, but hey, every little bit helps right! As for cloning, no unfortunately you can't clone an autoflower. To clone cuttings, you have to have them in the veg state and autos never have a veg state.
Autoflowering strains tend to grow super small, & since they're so fast at finishing it seems there is no time to train the plant. The autoflowering strains that I have seen were mainly just one large bud, it didn't seem like there was enough development to tie anything down.