I think this could be a data issue for second user if you are using different login users for multiple Vusers. TruClient has no correlation but you need to handle object identification properties either using input parameters, XPATH or javascript or custom 'c' code to make your script robust and work for different input datasets when you see that your application under test ( AUT) changes object properties during each run or with different input dataset.
I hope it helps!
Tnx!