Question : How do I apply computer settings via a group policy applied to user objects?

How do I apply computer settings via a group policy applied to user objects?

What I'm trying to achieve:
A set of users need to be able to format USB drives etc on any computer they use while other users will not be able to.

What I've done:
Created a group policy with following setting:
Computer Configuration>Windows Settings>Security Settings>Local Policies/Security Options>Devices>Devices:Allowed to format and eject removable media.
I've set the scope to Authenticated Users and Domain Computers
This has been applied to the relevant Users OUs

What happens:
gpresult shows the policy is being read but it does not show up at all under Computer Settings, only User Settings, where it is marked as Not Applied (Empty)

Answer : How do I apply computer settings via a group policy applied to user objects?

Computer policies are only applied to computer objects while user policies are only applied to user objects. The exception is loopback processing which allows computer policy applied to users based on the location in AD of the computer instead. See: http://support.microsoft.com/kb/231287