True. She is not a resident and nothing can happen to her in OR, but it's still enforceable if she comes to CA. Whether you're a citizen of that state or not, still accountable to it's laws if violated. It's why some states call them protection orders. Not hard to find a process server in whatever state and they even had the forms required by CA to prove she was served. They filled it out and mailed it back to me. $65 for same day service.
Also, you don't have to be a resident to file for a R/O against another person. At lease not in CA.