How to PCQ & Burst Limit

Users have 1mbps to proxy, each
Users have own IP not NAT, each

users MT → MT ruter → MT Proxy → Internet

Can PCQ with Burst Limit, work this :

User have 1mbps on 2 min, after that 256kbps, each.

I know how make PCQ to 1mbps for each users, with one rules, …

but, how make Burst Limit on that ?

I have to many users , can’t make separat rules for each.

any idea ?