Try this
1. Log in as an administrator and click Start, Printers & Faxes (Devices and Printers in Windows 7).
2. Find the printer you wish to protect, and right-click Properties. In Windows 7, double-click the printer icon and select Customize this printer.
3. Click the Security tab, and you'll see the security settings for the printer.
4. Highlight your account in the Group or User Names section, and make sure all boxes under Allow are checked.
5. Highlight Everyone in the Group or User Names section, and make sure all boxes under Deny are checked.
That's it! After you have made your selections, you will be the only one who can print on the configured computer.
Src: pcworld.com