Create two tasks, each task is 8 hours, assigned to the same resource, this resource only has 2 hours to process task A every day, 6 hours to process task B. So it takes 4 days to complete task A in real life. It takes more than one day to complete task B.
But currently two tasks in omniplan will complete in a day.
@timesir I can think of two ways to set this up in OmniPlan, but both require manually editing task details. You could create this type of schedule by splitting Task A into two hour increments (and then leveling with splitting enabled):