Alright....
So.... u got some users,
local users! I have never used HotSpot that way cause I have more than 200 Mikrotik devices running as HotSpot gateways.... I need radius and database .... either way I need a GUN to shoot myself
BUT as for what u are asking ....
Ur system is saving some info about ur users traffic on the disk! U have to find a way to pull that information out and to put it on the status page or where u like!? Up to my knowledge u have to write some scripts and activate them as appropriate!
Look at Mikrotik as a database.... Its funny, but the best way to explain what I mean
that info (user traffic usage) is saved on disk on a specific place
u need a script to check all that info (about traffic usage) using "username" as criteria to the specific value u r looking for!
then to save it to a temp value....
finally u need to modify the status page to show that value....
I have done this for a friend 4-5 years ago.... its working but I dont have the script anymore! and I still remember what a nightmare was for me to write it!
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Thats not the best solution. Thats what I can offer as solution -> read about Mikrotik scripts! U may find some examples of what u r looking for! I hope!