1. Proposed title of this feature request
Ability to serve a knative service on specific routers when using router sharding

2. Description : 
We would like to be able to link knative services with openshift  routers. So if a specific tenant create a knative service from his project, the generated ingress route by knative will be served by that tenant own router.
Generally to bind a router to a route, we need to add a label on either the project (so it will affect all routes created on that project) or on the route itself.
https://docs.openshift.com/container-platform/4.4/networking/configuring_ingress_cluster_traffic/configuring-ingress-cluster-traffic-ingress-controller.html#nw-ingress-sharding-route-labels_configuring-ingress-cluster-traffic-ingress-controller
According to the customer, this is important to have because for him it doesn't make sense to have a high level design based on multiples routers with knative (or other openshift product) not aligned to it. For them it's not usable at the moment.