Never even heard of Lipoderm Ultra, but a quick look-up shows a basic stim complex. You can take them together if you want, but who knows if you will reap more fat burning. Clen is just in a whole different league for fat burning.
If it were me, i wouldn't take together. Clen is rough at higher dosages, and i wouldn't recommend adding more stims to that. BP would probably skyrocket. You could try playing with the dosages, but, if it came down to lowering clen dose to be able to run Lipoderm... that's stupid. Clen should be #1.