I am using ubuntu 12.04LTS on my vaio laptop and I am in a situation that I have to use two different VPNs to have a good internet access and I don't know how to achieve that.because when I click on a VPN to connect(through Networks->VPN Connections), current connected VPN will be disconnected first.
As far as I know, you can only run one VPN using Network Manager. I have to run two VPNs (openvpn) at work, too. I connect to the first with Network Manager and to the second using a terminal. I have installed the byobu terminal emulator for this, because you can detach the vpn session from it (using the F6 key).