Manage parental controls from another computer.

I am looking for a way to manage the parental controls on another Mac, from my Mac. The steps described in this article do not apply to Mountain Lion: http://support.apple.com/kb/PH3864?viewlocale=en_US&locale=en_US and i can not find how to get this done on 10.8.

When i go to System Preferences > Parental Controls i only have the options to create a new account or convert the current account. I can not find anything useful in Users & Groups either.

Appreciate any help,

Jay