I think it’s tied to your e-mail handle actually. E-mail and Credit Card. I wanted to make a new ID because a charge didn’t go through one of my credit cards yet I was able to download the app. Now Apple wants me to pay my, “outstanding balance” which is bullshit because I totally had the funds for it, and I even downloaded it but the charge didn’t go through somehow. This was when Lion first came out. I don’t remember seeing Apple on my history of buying purchases but I also feel I don’t have to be the one responsible for seeing this through. Unfortunately for me they got me by the balls and until I pay my email handle and card are linked together. I wonder to add to your question if just my name will prevent me from getting a whole new ID?