Hide Workbench access section shows all the taxonomy terms in Drupal 7.10

hi,
I created workbench access control and workbench moderation with enforce to a content type.

http://drupal.org/node/1171382
As per the above link documentation , I configured two taxonomy terms. 1. Data uploading and 2 . Test engineers.

But for "add a content" it shows section both test engineers and data uploading options.

How can I hide or automatically selection of role as per the user logged in. ?

Now data uploading user can select sections as test engineers and test engineers can select data uploading section. This is not needed. If Data uploading role user logged in that "section" should be shown only data uploading role . Is this possible ?

Thanks in advance
Veena