MS Server 2008 R2 and printers

Hello, We have MS Server 2008 R2. We have printers that staff can print to that have locked security via security tab in Windows for that particular printer. We also have a wireless network for public users. Public users who have Mac laptops can connect to these printers instantly. I just tested a Windows 7 machine - and they can add the printer that is locked down as well. Does...