VPN Users - Duration Question

I've read a couple of posts that say that the VPN User Duration is calculated as a total session time for the IP the user is coming from. I don't follow this, but my question is...I simply want a report that shows how long a user was signed on for that time period. I could care less that in total they have a Duration of 40 Days.

Can a report be made that shows all users that logged in, let's say the past 24 hours, and how long they were logged in per session.

Example:

5/25/16 1pm - I logged in as user and spent 2 hours on VPN.

5/25/16 4pm - I logged in as user and spent an hour on VPN.

The report would show my 1st session for 2 hours and my 2nd session for 1 hour.