Aprroval from "iSupplier Portal Full Access" for Internal User

Hi,

We can see that iSupplier provides approval if external user sends update request.

Can we have the same functionality for Internal user.

Means:

There will be one Internal user

Internal User will update the record

Request goes to Approver as per iSupplier approval workflow

We tried below workaround but it is not working:

Registered a supplier and created a user account.

User account access will be given to Internal user instead of external user

User was having Securing attributes assigned to restrict access to its own account only.

Removed Securing attributes.

Still Not able to search all suppliers.

Please help.