The event name could be made to be able to have a variable link, but unfortunately right now it’s not 🙂
An alternative way of doing what you need as far as I understand, would be to use the SwitchString node, something like this:
Sorry for the late reply.
Are you referring to having the ability to set the string from a Blackboard variable?
If so, that is not yet added, because changing the serialized variable now (from string to BBParameter) will break previous projects.
Thus I will need to create a provide a ‘version 2’ of those nodes (CustomEvent) and deprecate the old ones, which is something to do in the roadmap.
Let me know if that is indeed what you asked 🙂