we have just updated the memberships plugin for our project theme, and gave it more features and more interesting behaviour. Here is a list of additions we done for the new update
1. added 4 packages for freelancer memberships (fill in as much as you need)
2. added the same 4 packages for the project owners / posters
3. made separation between memberships of freelancers and project owners
4. can have freelancers pay membership, and project owners post for free, or vice versa
See below a few screenshots with the new additions.