No, you can look up what property someone owns, generally in the town or county records. It's just if you own a property there's a good chance it's also your home.

I didn't get these mailings back when I rented. Confounding factor: I was in a different union. Same employer, though.

So, you can look up the private address of most homeowners in the states I've lived. Usually these records are online, sometimes not. If you want to obfuscate your ownership of a property there's some weird stuff you can do with having your home owned by a corporation and then you own the corporation or something. I don't think that's commonly done.