WiFi code to extend the authorized time limit

I was talking about Firewalla to a friend who told me he has a box called FritzBox on which he has the features Firewalla has and more. But there is one that I found particularly interesting, and I couldn't find that Firewalla has the same.

Basically, he can restrict the connection of some devices to 1hour a day but can generate codes to extend that time period. I find it great for parents as they can easily limit the connection of their children but give them a code to extend it from time to time when they did something good or need more time for their homework.

I would really like to see this functionality added to Firewalla