How to set specific work item permissions on Team Foundation Server 2010

In TFS2010 Areas and iterations, I can set users permissions to:

• Edit work items in this node

• View work items in this node

But I don't want to let one user change another user work item.

Is this possi开发者_运维知识库ble somehow? If I remove the "edit work items" permission they can't change even their own work items.

Our team has taken a different approach.

Most of our TFS Team projects are open to all contributors. We allow almost anyone to update almost anything. The reasoning is that mistakes will be few and since TFS versions everything (Except Labels) we can always find out if someone is not playing nicely with others.

Think about why you are trying to control editing of work items. Do you really need such fine grained control?