Custom Role to run Subledger Create Accounting as Business Unit specific

Summary

How to create a Custom Role to run BU specific Create Accounting

Content

Have a requirement to run BU specific Create Accounting Custom Role, when user runs Create Accounting should not pic other BUs Events in the Same Ledger. 

Example roles Custom Accounts Payable Manager assigned one BU Data Access. 

Any options and help would be appreciated.

Thanks,

Bala.