Item Permissions in HMC and backoffice

Hi Everyone,

I am using Hybris 5.1.1. I have created my own itemtype. Now i want to create a widget for it in backoffice showing list of items for that itemtype. The list of items should be restricted based on visibility to user.

So i would like to give item level permission to user. Item Permissions are permissions on particular instance of the itemType in the database. I would like to know where can we define item level permissions in HMC and backoffice.

How can we restrict widget data in cockpit NG/ backoffice based on these item level permissions.