'Programmable-Timer' for Internet Access

Is there a way for me, as administrator, to have programmable-internet access for user accounts. Kind of like my programmable thermostat. I'd like to enable Internet Access for myself 24/7, but for my 4 kids' accounts I want to tailor a profile for each; e.g. Internet disable after 10:00 PM, re-enable at 6:00 AM.

My Linksys Wireless Router allows me to do it, but I'd rather do it locally on the Mac, so my wife and I can continue to use our work laptop PCs without any restrictions.

I think I actually have OS 10.4 (Tiger). I've had the iMac since March 2007.

I believe your wireless router should allow you to control this using ip addresses...so just set up that the ip address of the iMac to only have access on certain hours, while your laptop ips have 24/7 access.

If I'm wrong, I apologize, but not aware of any software.

Brian

Ditto as above, thats th only way I have heard of.