You can add this functionality to your TestStand sequence by using the TestStand UI Messages
UIMsg_OpenWindows command. This command opens a file or window, or, if the file/window is already open, brings the file/window to the front. Add the below expression to the beginning your TestStand sequence, and when each DUT begins testing, it will bring the execution window for that DUT to the front of your currently open windows.
RunState.Engine.PostUIMessage(RunState.Execution,RunState.Thread,UIMsg_OpenWindows,0,"",RunState.Execution,True)