Restricting Data For Certain Users

Hey, I was wondering if there is a way to restrict certain data from individual users or groups? I am aware of the Dashlet Level Access Control plug-in and think that it will be helpful, however does that allow for restriction that is more defined? Such as if a certain amount of leads, contacts, documents, etc. were to be restricted to people in specific territories. That would be more defined than just restricting the entire contact category. In addition to that concern, I wondered about the safety of the system as a whole. Can something additional be purchased that would increase the security of the system itself?

You;d need to custom build this, it’s not something available out of the box. As far as plug-ins, I’m not aware of a plug-in that handles this level of control.