Users
The v3 alpha360 Business applications have a really simple implementation for controlling user access.
It is based on entries in - what else - the dbUser table ..
There is no access code in BPs - like v2 - and access is handled from menus and the functional areas.
If your installation is really critical, you must build a more robust access system of your own, or use WXs access control - available in all WX products.