Yes, there's an example for doing precisely that on page 4-9 - 4-10 in the manual.
You may not be able make the router "unavailable" entirely, but if you disable the ports that they use - HTTP and HTTPS, for example - they won't actually be able to do much!
It's quite good, as you can block all their PCs based on IP address (you really need static addresses, or DHCP reservations for that to work consistently).
It's also possible to configure login time restrictions on Windows User accounts - although they will not be ejected if logged in before the curfew (you can do that when joined to a domain).
SD