To limit download size

[ELOM ETSE]

Hello!
I want to limit users downloaded and uploaded file size. I remark that WISPr-Bandwidth attributes  can limit the band width.But this what i need: For example
Hitchcock can never download more than file of 25 Mo
Hopeson can upload file less than 12Mo of size.
Please which attributes must i use? 
Is it possible to use them without reconfigure freeRADIUS server?
Thanks



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