Deny users to create Domains

[apinto]

Further Question (before I google for the documentation ): Can I add user levels?
I think no - or yes? Don't know.^^

Yes you can.
When I said user levels I was referrign user groups.

Check it at Reseller -> Manage User Groups

You can thread them as user levels.

Also, you will need to setup what each user group can access on Admin -> Module Admin (tick the check boxes  )