Restricting users using the same transaction at the same time to display

Hello Experts,

My requirement is user will put a value in one field on selection screen. In case the current user is running the report, the same time any other user should not be able to display the report for the same value entered in the field on the selection screen.

How it could be done? I could not use table lock because the field is not a key in the table.

Whether the authority check could be used in this case? If yes,how.

Please suggest.

Thanks,

Rahul