Limit Band For User with Hotspot

Hello, I wanted to know if it were possible to subdivide the band
(ex dw 256k, up 128k) on the single user and on the group,
not considering that I have 800 user in the network
As I can make?

Yes, you may set rate-limit for user profiles:
‘ip hotspot user profile set profile_name rate-limit=’

thanks for the timely answer
I use radius for the authentication and not the db of mikrotik: (

solution?

Rate-limit can be set at RADIUS server too, check the description.
http://www.mikrotik.com/docs/ros/2.9/guide/aaa_radius||0.5625776183248241