Team Interest Management provides for having networked objects only visible to those on the same Team, using a Network Team component on the player object and as well as networked objects that need to have their visibility restricted to a team.
Add the Team Interest Management component to the same object as your Network Manager:
Add a Network Team component to the player prefab and any other prefabs that will belong to a team. Set the Team ID to the same value at runtime for players / objects on the same team.
Enable Force Shown on Player objects so they can be seen by players on other teams.
By assigning a unique value to Team ID for each player and the objects only that client should see, you can achieve "Owner Interest Management" similar to the former Network Owner Checker.