This is impossible in the current implementation (and I don't know if that will be in future versions). What you will have to do is to add this information to an assigned FAD for the task.
Thanks for your response! The FAD is a possibility, but I don't really like to connect FAD diagrams to BPMN models.. But it might work for the short term!
Another thing why I don't like the FAD model:
I would like to create a library with standard diagrams including risks which are connected to standard controls. This will allow me to identify risks within a process and to re-use the already identified controls in order to mitigate this risk.
that will be the same situation. What I did in an old project was to add risks to FADs and maintain a custom attribute with an attribute symbol that was maintained at the function to indicate the existence of a risk on a lower level (a boolean with a red and a green triangle that indicated a financial or other risk).
You could autmate the maintenance of that attribute with a report that get's triggered when you save the FAD after modeling the risk > e.g. "check if there is a risk connected to the function, go into attribute x to see if it is a financial or other risk. If yes, maintain the boolean attribute". Your template then has to be modified to show the attribute symbol if maintained by default in FADs and/or BPMN diagrams.