Welcome to the ODK forum, @casdemooij! We're glad you're here. When you get a chance, please introduce yourself on this forum thread. I'd also encourage you to add a picture as your avatar because it helps build community!
The Get ODK team recently published a roadmap for ODK showing what they're working on. It doesn't have exact dates, but rather just Now, Next, and Future categories - as it can be hard to predict the exact time something will be done. Currently there's a card for "Enhancing user permissions" and it is in the Future group. The ODK team is always interested in hearing from users. If you could describe your use case(s) in Ideas it will help them when they begin work on that functionality.