Radius manager daily sessions

I have discovered Radius Manager (DMA Softlab) is a session based system but if customers like most stay online for days,
PPP active connections will have uptime of days, how apart from this simple script below ran daily, can I supply to customers their request for daily usage, 12 days of traffic usage for March is not what they want?

:foreach i in=[find] do={
/ppp active remove $i
}