Can Project Orgs be secured by Reference Data Sets

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Hi,

We are trying to restrict the list of available Project Orgs to select during project creation by Business Unit.  We are creating Project Orgs based on HCR Depts, which have been setup using reference data sets specific to each Business Unit.

Is it possible to limit the available project orgs by using reference data sets?

Do I need to set the reference data set at Project Unit Set Assigments, and Project Types?

 

Thanks,

Brian