Which features can assign bandwidth limitation for a group of users?

The feature that can assign bandwidth limitations for a group of users is the Queue Tree. Queue Trees in MikroTik are specifically designed to manage bandwidth by defining limitations or guarantees at a more granular level. They allow network administrators to create hierarchical queues that can prioritize or limit the bandwidth usage based on various parameters, such as IP addresses, protocols, or services. This capability makes Queue Trees particularly powerful for controlling bandwidth distribution among different sets of users or applications within a network.

Mangle, while useful for packet marking and manipulation for various purposes, does not directly manage bandwidth limitations. Address-list serves primarily for categorizing IP addresses for filtering or routing and does not inherently limit bandwidth. NAT (Network Address Translation) is focused on translating IP addresses and does not involve bandwidth management. Each of these features plays a role in network routing and management, but for the specific purpose of assigning bandwidth limitations, Queue Trees are the appropriate choice.