New User Registration

I would love when a user agent creates a new customer, it NOT email the user. Our system is B2B where the agent is our client making orders for their clients. 

We do need all the information about that client and making them a customer/Wordpress user seems like the right approach. 

But, the person they are shopping on behalf of should not be able to know this. 

Giving them an account shows them who we are and the wholesale price of what is being ordered on their behalf by our client

Also, as it relates to the screen capture, how can I customize what fields are being captured? For instance, it doesn't ask for the state or allow for apartment or suite numbers, both of which are very, very important.

Any thoughts on how to handle this?

Thanks!

Jon