Possibility of preventing users to post Project Cost for particular BU

Summary:

Business users are selecting the wrong business units when loading project cost ADFDIs. Is there a way to prevent a BU from being selected for a particular transaction source within the Project Cost ADFDI if the user has access to inquire on costs for that BU in Project Costs?

For example: If a user has inquire access on the OHIO business unit, but should not be posting costs to that BU, is there a way to disallow that OHIO BU from being available on the ADFDI?

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