RBAC Implementation question

For a R12 installation (version 12.1.3) by using RBAC we would like to implement the following scenario for Conc Req Output:

"A certain set of of user should be able to view O/P of user TEST & not all users within same set of responsibility."

We have gone trough the instructions in Note R12: How To Configure Access To Request Output Of The Same Responsibility (Doc ID 804296.1)

And one of the example predicates that has been tested is the following:

&TABLE_ALIAS.request_id in (select cr.request_id from fnd_concurrent_requests cr where cr.REQUESTED_BY=(select USER_ID from fnd_user where USER_NAME='usertest'))