When I add a static route on firewall or enabling antispoofing

ip route interface) nexthop gateway interface let say eth10)

192.x.x.x is owned by our network...
Interface when see through show route destination command...

When I add 192..x.x.x on Antispoofing group what exactly it means ??

Is it any traffic comes from 192.x.x.x going to internet
and any traffic comes from internet to 192.x.x.x on firewall should come on eth10 else it will be discarded.
and is it also mean any traffic from internal network going to 192.x.x.x should come on eth10