Identifying expenditures posted against Invalid POETA combinations

I'm trying to create a report to identify expenditures posted to Invalid POETA combinations

example :

Project A has tasks 1,2,3,4

Award B has only tasks 1,2 assigned to it tied to the above project

Award C has only tasks 3,4 assigned to it tied to the above project

If an expenditure item hits Task 3 but Award B - the report should be able to identify such transactions as there is no task 3 in award B 

Can anyone provide a lead as to how to identify such invalid poeta expenditures

Thanks !!