Binding Outgoing IP on Multiple NIC

Hello mates
I am using haproxy for a reverse proxy.But i tested and realized that traefik is much more efficent and fast.But in my case there is remote server and there are multiple network cards.In haproxy i can manage outgoing traffic.So i can tell my backends to go via this network card.Config in haproxy is below:
server server1 source maxconn 4 check
server server2 source maxconn 4 check
here my remote server is
my first network card's ip is
my second network card's ip is
So this proxy doing a load balancing between network cards.
How can i achieve this in traefik ?