How to intercept Commerce Manager account creation

I am trying to determine how to catch the Commerce Manager Create Account method invocation so I can do a few additional things.

1. I want to populate some additional fields that are not populated when the User is created.
2. I want to set some roles for the User.
3. I want to send a confirm account email to the email address associated with the User being created.

I have already created an interceptor similar to what's listed here that is intercepting Create User from the CMS, but that interceptor isn't catching the user being created from Commerce Manager.

For some context the solution I'm working in has 3 projects:

1. The main Web project
2. The application logic project
3. The Commerce Manager project

The interceptor I currently have working is in the application project.

Any and all suggestions or information is welcome.

Thanks!

-Andrew Pohto