Yes you can. A novella is just like a novel except shorter. As such, it can contain everything that a novel contains but in more compact form.
If you decide to have multiple viewpoints, make sure the reader is clear as to which character’s mind you are in at the moment. That’s not hard, it just requires that you truly BE in that character’s head when you are writing from their point of view.
If you are truly thinking from that character’s point of view, then more than likely your reader also will know what’s going on and who is doing the narrating at the moment.
Check by having someone else read the story and ask what they think. Ask if the point of view caused confusion. They probably won’t know why you are asking because it’s totally clear to them.
