If you want to set the DSCP marking for a service in Valkyrie1564 you check the IP Header box in the Service/UNI configuration page for a port:
You now get a section where you can adjust the DCSP marking.
The IP addresses are defined per physical port. If you want 3 services with different IP addresses you will need 3 different physical ports, one for each service.
When the IP Header box in the Service/UNI configuration page is checked for a service, you can set the IP address for the physical port in the Physical ports page: