FuelCloud offers three ways to control access to your tanks.
Access Groups & Individual Access
By default, all drivers will have access to all vehicles and tanks in your account. If you want to control which vehicles and tanks a driver can use, Access groups & Individual Access can be used to assign drivers to specific vehicles and tanks.
You can use Transaction Limits to control how much fuel a driver can pump within a given period of time.
By default, Drivers can pump fuel at any time. If you want to control when a driver is allowed to pump fuel, use an Access Schedule.