yes, you can set it.
In your uptimelimit set the time you want to limit the user, like, 1hour = 1h, 1week = 1w etc.
If you want it for like 2dys, st that in validity while creating profiles.
Or just click on Profiles-Create New profile-----,put the name, of the prfile, eg 1hour, in validity=let this be the days it will last b4 it expires.
Then in profile-limitation, d name shd be d same, but uptime limit shd then be d hour to browse eg 1h.
let me know if that helped you.