Best way for actor selection

This is an engineering environment. We have a group called Engineering that has 5 people:

George, Harry, Sally, Jose, Ming

Anybody in the group can create a part. Create a part is a task. After we create the part it goes to a task called "Check part". According to our rules the person that created the part cannot check their own work.

Task: Create Part
​Actors: Engineering

Task: Check Part
​Actors: Engineering

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	Is there a way to select all the users from the engineering group and then exclude the user that completed the previous operation?</div>

As it is now when George completes a part then he still shows up in Check Part for his own part.

Any ideas?