Extended Notifications sending task, that belongs to other agent

Hi experts,

I've just configured SAP extended notification to send emails to users, whenever there is some new pending work items in their SAP inbox.

I have configured the SWNCONFIG, and all works. But sometimes somebody receive an email with a task, that it's not in his inbox.

I have seen, that maybe he had approved a task previously in the same workflow...

Could I set a filter in the SWNCONFIG under "Business Scenario" > "Filter Basic Data" > "Filter settins" or something?

Thanks

Rub