Follow these steps to add a user as an owner of an app that belongs to your org unit. This effectively delegates the app to that user, so they will be able to categorize the app and answer any questions about it.
On the Apps tab of the Inventory page, click the name of the app.
Scroll to the bottom of the app info page. In the Owners field, add the user by username or email address, being careful not to remove the existing entries, then click Save. The user does not have to have any roles in the owning OU.
Now the user specified will have the ability to classify the app and answer questions about it when it gets assessed.