No he doesn't own being a vigilante or a costumed superhero.
But Batman does own the Bat-cave - which Batwoman breaks into, the suit - which was altered without his permission and is being worn by the person who stole it (what would you say if someone broke into your room, took your clothes, had a tailor alter them to fit their body then wore them around?), the gadgets - which Batman either made, paid for or invented himself, and the idea of Batman in-universe - which he made based on his own personal experiences and fears. I wonder if Batwoman is also going to go joyriding in the Batmobile or the Batplane...