So after spending a few hours on this i couldn`t figure it out.

I have created IP objects of the destination IP that i want and an IP group and then tried to add a policy on the Draytek 3900 but it won`t let me select the VPN, only the VPN Truck Pool which there is none.

I have tried added the extra remote subnets in the VPN profile but this doesn`t work. Does anyone have any ideas on how to forward specific IP traffic through a specific VPN profile?