I use google analytics and webmaster tools for my whitehat sites. I don't have any problem with this, although I hate google for being the big authority of the interwebzz, I like them when they bring me some good organic traffic & having the stats all together in an account is cool.
I didn't really get what you meant by asking 'will that let google own they are owned by one person?' but I guess google may assume that you may be working as a website manager for companies. why would you care?
Geez, got me confused a bit,
Va Silver.