How to Limit Internet bandwidth and speed for other computers?

Basically, here’s the scenario.

My brother tends to run these vigorous programs, such as that of Utorrent, and hogs up the whole bandwidth in the house. When he does these kinds of activities, I am unable to navigate through the internet effectively; even as simple as checking my email!

There anyway to limit his internet speed? A method that he won’t know it’s actually going on.

Thanks!

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