Ability to view secondary contact's incident upon logging into customer portal

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Hi Geeks,

Can you kindly help me out with the below requirement,

 

 A contact after logging  in to the CP page  should be able to view the incidents where they are marked as primary contact

and they should also be able to view the incidents where they are marked as secondary contact

is there any way to do this?

Your help in this would be much appreciated.