Populate Expense DFF Values Using SQL or List of GL Segment Values

Summary

Populate Expense DFF with Filtered List of Values from GL Segment

Content

We have a requirement to add a descriptive flexfield to expense items for project.  We are not using the Projects module but project is a segment in our GL account number string.  We want the creators of expense reports to have a drop-down list of some of the projects, excluding some specific ones.  Is there a way for the DFF to display values from SQL like below.  The functionality we are seeking will automatically include any new project values but will permanently exclude some specific ones.  Thanks, Wendy