Istio RBAC restrict to sercicenames

we were able to define the service role binding based on service account by mentioning the user and namespace level by mentioning that in properties. Is there any way we can allow only a particular service to access other service. Instead of mentioning the user or namespace level, we want to control based on the service names. The main reason being if we give control w.r.t service account level, any deployment can use the service account in the same namespace and get all the access. How can we solve this.?

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