Source: http://forums.dlink.com/index.php?topic=8057.0
I use Filter Rules under Advanced section. However this limited to 20 devices to filter HTTPS by port 443. Downside for apply filter by port on a device, all https sites cannot be used. There aren't any solutions for filtering on specific websites via https yet.
However this filter won't work of the person has more than one devices. I counter it by using MAC filter but that's just limited to 10 devices to allow to connect to WiFi or to deny any foreign MAC.
Other way to do is to use Intrusion Detection System (there are some freewares out there) to detect any devices that violates your "rule" and block them from there.
Good luck.