Squid and selective VPN routing

[VoNpo]

Hi,

I already have selective VPN routing (PIA), few LAN IP's are directed straight to WAN and everything else goes trougth VPN Gateway group.

I just installed Squid and figured out that it will leak my WAN IP address. (with standard settings)
If I select only VPN's to proxy interfaces, leak will stop but in that way those IP's which use WAN are not going trough proxy server.

Is there any way to keep my existing configuration and add Squid for whole LAN without leaks?