Although i haven't try it, i don't think that you can use vpn client to connect, in the same time, in two networks. I don't know if vpn client has the ability to create multiple tunneled interfaces to do this.
I have used cisco vpn client and openvpn client to connect in the same time in 2 different networks.
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...