@Monsse A
There are a couple ways of doing this. Within just the 3D model, on process finish you can set a type and color for each Processor so that on process finish it's type will be updated as will the color. (You can do just type without color too)


Within Process flow you can also update the the type by using the Assign Label task to add a type and then for each process have a Wait For Event task that can change the type after each specific process.
(Assign Label)
(Wait for Event)
There is also a cool feature where you can add a floating text above the flow item that can show what processor it has been through. You can find information on how to do that by following this link. https://answers.flexsim.com/articles/68181/showing-a-label-text-on-flow-item-object.html

If you upload your model and a little more description of what you are trying to achieve, we might be able to better help you with your situation.