How can I cap inteet for users on virgin

I share a house with friends and one of them is very selfish, constantly downloading, streaming music and playing computer games at the same time. How can i cap his devices so the rest of us can use it for normal use?

Extra Details We use a Netgear Router On Virgin Broadband

P.S I have fair knowledge on Computers and programming but not with networks and server, I am happy to lea how to do this just want a pointer as I am lost when looking on google.

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