There isn't a show command that shows this information. Invalidated sessions are sessions that are due for cleanup/deletion, holding them in memory so that they could be viewed may present other issues. The behavior can change slightly depending on some configuration settings (i.e. set security flow tcp-session rst-invalidate-session).
If your issue is a ...
The neighbor statement implies the remote PE (which should be reachable via MPLS), so in short, inet.3.
I'm leaving the config out, but you'd see Remote PE in the output of show l2circuit connections as 192.168.2.2 in your case.
jhead@PE1> show l2circuit connections
Layer-2 Circuit Connections:
Legend for interface status
Up -- ...
There are two labels, so as traffic ingresses the PE from the CE there is a double push.
Every interface gets a label from that L2VPNs label block. The inner label is based on this interface specific label for the remote L2VPN site.
L2VPN's use the same NLRI as VPLS in that they contain:
Edge ID (Site ID)
Label Block Offset