separate vlan for trial users in HotSpot

Hello. Currently trying to implement isolation of Guest users in Hotspot. Is there any way to put trial users into separate VLAN?
I can detect all trial users based on ip → FireWall → address list to use mangle for marking connections, but due to interface nature of VLans in ROS can’t find any way to assign vlan to trial user.
Any workarounds or directions how to implement vlans for trail users in hotspot?

Hi.

You can assign VLAN with radius.

Check this out, it will help you.

https://mum.mikrotik.com//presentations/CN16/presentation_3107_1461137144.pdf