Yes, but you should really only use Neutral in emergencies or when stopped. You downshift from D to 3 or L to go up very steep hills, and you can do it while going downhill. See your owner's manual for full details before doing it.
Short answer is Yes you can shift the range selector in those stated positions while the car is moving, however the computer is still going to determine the shift pattern and what gear will be safe for the engine speed.Can you shift from L to 3 to D, or D to 3 to L while the car is moving?