Supplier Portal: can I split the Supplier Profile Change Approval?

Summary:

I would like to not apply any approval workflow when the supplier adds new contacts in Supplier Portal.

At the same time, when the supplier adds more details in the Business Classification Page, I would to submit an approval workflow.

Can I separate those two events in order to apply an approval workflow in the Suppler Change Profile only when there is an update into the Business Classification by the supplier?

Content (required):

Supplier Portal

Version (include the version you are using, if applicable):

23A

Code Snippet (add any code snippets that support your topic, if applicable):