Hello,
all you need to do is to remove "Transaction name begins with ..." condition. Keep just "Duration greater than 10 seconds" and "If condition exists for greater than 10 minutes trigger action.". Then alert will distinguish each individual test so it will trigger only is specific test is over 10 seconds for over 10 minutes. If WEB01-TEST1 is over 10 seconds for 9 minutes and then WEB01-TEST2 is over 10 seconds for 9 minutes, alerts will not trigger.
My initial statement was incorrect, see clarification below.
