Organization Goals - provide access to specific org leaders not entire org

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Hello,

We would like to provide just a small list of org leaders access to create Org Goals (via the My Organization Goals tab).  With our current configuration, we create for example a 2018 Organization Goal Plan and then on the Organization Assignment 'train stop', search for an org leader and provide access there.  However, in doing so, the leader's entire org now has access to create Org Goals, something which we would rather not allow.  Is there a way to prevent this from happening?

We've tried to use Worker Assignment 'train stop' but this appears to provide access to the Org Goal Plan on the worker's individual/performance Goal tab which we do not want.