Anonymizing and de-anonymizing report data

Hi there,

I have a question about the anonymizing feature under the Report Settings tab.
My client wants to ensure that user data is being anonymized when he schedules reports. However he wants one account to be able to view user based data. For that account report data shouldn't be anonymized.

Is that at all possible? Do I use the de-anonymization tab?
Or does anonymizing work enterily different?

Hope you can help. Cheers.