There are some threads about parental control in the forum which is probably something similar.
I understand time scheduling per client and some type of filters will be included in that feature.
It is included in the list of feature request:
It is suggested it will be added in 4.100
Currently time restrictions can be done with the usual openwert Firewall → Traffic Rules → Time Restrictions, but I understand they plan to add something more visual to the gl-inet gui layer, perhaps with a weekly/monthly calendar where the user can visualize the status with red/green colors and slots of 30min similar to Asus parental control. No details yet.