To get access to data in your ftl's, you need to pass the values as part of the "Content" parameter. So, in this case, you could create a new process variable contentVariable and set that to a Map that contains the value of one or more parameters you want to pass (like userT). You can then use the parameter mapping to map this contentVariable to the Content parameter. You can then access the values of these parameters in the Map inside your ftls.
Kris