Maintenance Level

Is it possible to configure a user with less privilege in winbox or web configuration ?
I.e. decide what settings can a user go to modify ??
Thanks

You can use skins configuration:

http://forum.mikrotik.com/t/webfig-skins-tutorial/47486/1
https://wiki.mikrotik.com/wiki/Manual:Webfig#Skins

or just give them read priviledges instead of full when creating the user.