Korganizer / Kontact: different heading for each task list

I have different to-do lists: most important, the work-to-do-list and the sparetime-to-do list (divided in things like restaurants where I want to eat or movies I want to see).
In Korganizer, all tasks are shown in one big list. Can I have them split up in the differents lists I have? I already use priorities, so that’s not a solution to make the difference visually.