And now I've lost the thread of my previous research.
Not all D-Link Routers allow bandwidth monitoring and controlling.
Here's a link to D-Link page that lists the ones that have the needed features.
If you happen to be running one of the listed routers, here's a step-by-step, from D-Link:
If the above is not available to your specific router, here are some general ideas:
I must have had a senior moment during my first reply to you. I apologize.
I'll continue searching to see if I can retrieve the earlier found material.
In the meantime, please post back with your progress.
*** Thanks for stepping in bringbackCthulhu
. Your assistance is appreciated.