How we create new region on worklist notification page

Hi,

I am working on Performance Management Module.I required to create new region on reviewer page .Reporting officer submit employee appraisal to reviewing officer.Reviewing officer received notification in his worklist.We open notification and create new region on the page thorugh page personalization.

Now problem is that this region is also appear on other worklist notification .

Can anyone guide me to create new region on worlist notification without impacting other notification.

Regards

Sangita Vats