Hi everyone! I'm a potential requester for MTurk, but I have a question. Is there a particular forum where I should ask it?

In short, I want to limit workers to completing one HIT per batch. I have a set of tasks that, due to their nature, should only be completed once by any given person. I can see on the MTurk website how to do this for something such as a survey, but the tasks I have in mind are all different. Any advice?