HELP: Connecting to the Java Dictionary from your Local NDS Environment...

In order to simplify local development and remain consistent with the use and data in the Java Data Dictionary, we would like our developers to connect to the JDD on the development server. We believe we can accomplish this, but the question is "How do we set security on the central JDD so that developers cannot update tables and data that do not belong to them"??

Any help would be greatly appreciated.