Bob, i have the same question regarding split tunneling on L2TP VPN using Microsoft vpn client.
If i uncheck 'Use deault gateway on remote network' in 'Advanced TCP/IP Settings' in the VPN Connection Properties, then i have in my local routing table a default route using the local lan interface of my home router, and thus i cannot reach the remote encryption domain of the VPN.
If i leave 'Use deault gateway on remote network' in 'Advanced TCP/IP Settings' in the VPN Connection Properties checked, then i can see in the routing table of my PC 2 default routes: one using the L2TP local interface and one using the LAN interface of my router; the difference is that the one using the l2tp interface has a lower metric, thus it is preffered and all the traffic is routed through it.
So as far as i can see, it is either i have a full VPN tunnel, either i don't have a tunnel at all. Is there any chance to configure a split tunnel on the l2tp vpn setup?
Thanks