Restricting the values of a dashboard promt

Summary:

Hello,

We have made a BIP report on an Assessment which will show the candidates who have reached the assessment state and their results/current status etc. The report behaves as expected. Our client uses positions for requisition creation. The report is going to be used to show all of the candidates who gave this assessment for a specific position (requisition). So we have included a dashboard prompt of position name in the page as well. The issue is that this prompt dropdown currently shows up all of the existing positions from Core HR.

How can we restrict the values of this prompt to only show position names( i.e. requisition names) raised by the user(recruiter) who is logged in.