Changing a user account's policeis (permissions)

Hey guys n gals,
This might have been covered somewhere else, is so could someone throw me the link.

Anyway, I have set up another user on my computer. They have a restricted account. But I would like to tighten it up more. When I look at the Group Policy Editor (gpedit.msc) I don't seem to be able to specify a single account. Is there another Policy editor for individuals or is there another way I can restrict what a person can do?

I wish I had AD at home!!

mucho thanks!

 

If this can't be done in Windows, is there software that can be downloaded to do it??