Does WIT customization support this feature?

Tao Wang CSI

I want to implement such a field:

If left the filed empty, all valid team project users can access the work item (Visible). If i filled the filed with a user our group alias in valid team project users group, the work item will only visible to this kind of users.

Supported by customization or work item tracking system

In other word, whether I can set access permissions against a single work item or the work items under specific area or iteration

Naren Datha - MSFT

You can set permissions for workitems under specific area path. In team explorer, select your project and select Team/TeamProjectSetting/AreaIterations menu, and check security dialog for the area you are interested in.

v-tawang

You mean that define a field to control the permission for a specific work item is not supported. Is right

Naren Datha - MSFT

To be clear: Permissions cannot be denied/given to a group name specified in a field's value. Permissions can be specified in area/iteration dialog, or in workitemtype definition on transistion etc. Does that answer your question