SilvieA,
The tasks cover a wide spectrum of BDSM--although some are sexual in nature, many are not & focus on other aspects of BDSM such as theory & service. The tasks are designed to help you grow & learn more about yourself as you take this journey in BDSM.
As for who "makes" the tasks... in Level 1, the task list is posted & you choose certain tasks off the lists as the instructions provide for. The tasks aren't 1-on-1 play: that's not what the Tasking area is designed for. The Tasking Coordinators are there to facilitate & help your experience, but you don't "report" to anyone, so to speak...
Hope this helps.