This was asked back in 2013 by someone else, but I wanted to see if it's possible now.
We want to easily identify sub-tasks between incidents/problems and other service requests. I created a sub-task issue type for incidents and while it is selectable when you create a sub-task, I want to restrict the "Incident Sub-task" for incidents/problems so that Agents don't have a choice but to create the appropriate sub-task type depending on the Issue Type.
Is this possible?