Hey
The game basically has cookies that check for the name of the user account on your computer. For example, when you log on to your computer, you see who owns the account (then you enter your password and arrive on the desktop), well that's the name the game uses. If you change your account name on your computer, it will likely change in game. I never set a special name so the game asked me "Is your name Owner?" (which isn't my real name of course).
Don't worry it is perfectly legal and many other games did the same too (to create a surprise effect), the game don't possess all of your personals informations and the game don't remember your name to send it to anyone.
(Sorry for my bad english btw i'm not a native speaker)
Hope it'll help you !