Is there a software solution to do this as I am confused as to how to do this through the modem?
Is there a software solution to do this as I am confused as to how to do this through the modem?
Either a QoS router like Tomato firmware on a Linksys WRT, or a full router/firewall like pfSense on a small PC. There are many others such as Untangle, Smoothwall, etc.
Otherwise you have install software on each host to throttle the traffic.
Does this software run as a service otherwise can it be run from one of the other Windows users who stays logged in?
Took a bit to find it, check it out, quite comprehensive:
NetLimiter - The Ultimate Bandwidth Shaper
MetroBlazer media converters - Home make switches you can rate limit per port.
any cisco router (not linksys) can do rate limiting per IP even per protocol. Other bandwidth managers worth looking at dbam, bluecoat, packeteer.