Team specific workflows
One answer
Open the Eclipse client.
Open the Team Organization View.
Expand the project area you are interested in.
Select the team area. Right click the team area and select Open.
Go to the Process Customization section in the Overview tab.
Left Click Customize the process.
You can change process configuration settings such as permissions, operational behavior.
You can not change work item attributes, workflows or something like that.
If you want to do that, you need to create a new project area for that team.