I keep getting another persons stuff printed on my printer, his is exactly like mine. We are the only two exactly the same on our network. How can I make sure my stuff goes to my printer and his stuff stays off mine. In system preferences the printers are listed the same. I try to change it to my name so it can be seen as my printer, but it doesn't make the change. I'm tired of this dude using my ink, oh and by the way I DO NOT HAVE THIS PRINTER SET UP TO SHARE!