It's *not the address that matters, it's linking him to a specific LLC. If he bought his car under the same LLC that bought the house where he lives, then you can find him through the LLC.
If he used one LLC for car, another for the house, the point is moot... but the article leads me to believe they are under the same LLC, hence the initial comment.
I suppose a better question to have asked would be if there was/is any benefit for the DMV associated car+house to be purchased with an LLC rather than outright?
EDIT: a word