Routing users on MikroTik

Hello,
I want to direct my users on mikroTik router.
I want to assign a network to each group. How can I do this? Can anyone know about this issue help?

YOur requirement and use case information is a bit too vague.
Diagrams help but also clarity.
number of groups
Should they be on separate subnets
How do they gain access to the network
Do they use different WANIPs…

Your description invites more questions than it appears to ask.