Custom concurrent manager setup R12

 Hi,

I hope this is the correct forum to post this question.

My scenario is that I want user John to always use the standard manager except when he requests the budget upload. Then I want to use a custom manager. But when anyone else requests the budget upload, I want it to use the standard manager. When user John requests anything other than the budget upload, I want it to use the standard manager.

I have attempted different setups, and all requests for the Budget upload uses the custom manager. I can't seem to limit it to just user John.