The system allow you to set as many delivery zones you need to. Each zone map get drawn online and can set the delivery fees per order type. These zones will force the fee on checkout and will validate user address is in one of the zones allowed.
You can add as many zone needed and set delivery fee and minimum order amount for catering.
The restricted zone setting will allow you to set the MAXIMUM radius area you willing to deliver. Even if outside the last delivery zone. In that case the order will be pending admin approval!