As said, you'll need a managed switch which are typically the preserve of SMEs, but obviously are available on the consumer market. The price is fairly substantial mind you.
You may know this already, but don't confuse traffic management with QoS. All QoS will do is prioritise certain types of network traffic, not restrict it.
Alternatively, Draytek routers allow bandwidth restrictions based on port, but you'll typically only have four ports available.