Access the router's setup and create an outbound filter. You can designate specific IP blocking and/or limit it to specific times of the day. Also set up the router access with a password so she can't enter the router setup. The down side here is if she presses the router setup button, the access password is reset to default and all filters are gone. You need to make sure the router is secure, as in somewhere she cannot get to it physically.
Daughter stay up at might on skype. Hard to block.
Is it possible to block Skype using my Netgear WGR614v6 router?
Any and all keywords? Ports?