Dynamically assign users to queue tree

This is my first experience on RouterOS. We have a set of Routerboard with RouterOS 2.9.11 and now we have the necessity to assign PPPoE users to specific queue tree nodes, based on the Radius-User-Group attribute. How can we achieve this?

Firstly I suggest you to use more latest version 2.9.51.

It is not possible to setup queue tree with RADIUS attributes.
RADIUS attribute MikroTik-Rate-Limit [that is responsible for bandwidth limitation] creates queue simple entries.

Mikrotik-Rate-Limit is what we’re using now, but the need is to assign users to a queue tree structure. No way to do so? A script cannot fetch RADIUS attributes and use these as parameters?

As far as I know there is no way to use queue tree with RADIUS attributes.