Hi Hanz,

You are talking about project groups? That is a way to organize project and you can use it any way - no workflow enforced. We use them to keep development projects apart from other projects (writing, support etc). I know of a company that uses them to group projects per department - every department has a group so they can access only their projects among hundreds of other projects.

Project <> Group relation is completely optional and if you don't see how they could fit in your workflow ignore them.

Project groups aren't covered by the demo - can you post more info and some screenshots?
Can you include people in groups regardless of whether they are an owner or client member?