Hello Poola Pujitha
In the entity first check the ‘Store Owner’ option in the entity properties, and in the entity security,
write the XPath: [System.owner='[%CurrentUser%]']
You can refer to the following image for reference,
Step 1 :- Go to the Entity and check the store "Owner"
Step 2 :- go to Access rules ( go inside the rule) and go to x-path section there add the below expression
Please let me know if anything required
Thank you