My router is Mikrotik RB951G-2HnD and I would like it to limit the connection speed to a particular website once some amount of traffic between the user and the website has passed. The website ip range is known, the user is set up by dhcp.

1. There is a connection-bytes switch for /ip firewall mangle rules. I could start marking packets or send users to an address-list based on that switch. However, I can't single out the user in this case. Every user connected to the website will contribute to reaching the threshold and then everyone will get a speed limit.

2. It looks like the User Manager package might be what I am looking for but it's not preinstalled on the router and I would like to avoid installing extra stuff if at all possible.

3. And there is RADIUS which, judging by wikipedia, is pretty hard to understand let alone install. Looks like an overkill.

Is there a simple way to limit the speed of a particular user-to-website connection after a certain threshold has been reached?