NTA and Monitoring/Reporting

Hi

I`m using NTA now since 2 month. Before we used Cisco MARS.

Compared with the MARS the NTA reporting is pretty poor ..... or maybe i don't know how to do it.

What i actually want to do is to monitor and/or report traffic caused by VPN users.

So our VPN Users terminate at the edge firewall ... this firewall is sending netflow to NTA, and is also sending logon information to the radius server.

Can somebody tell me how to get this information out of NTA?

Thanx