Hi there,
You’re correct that you need to decide a way to identify in the projects who the projects are created on the behalf of. Since this a project-related field, a user report still won’t work. Couple ideas:
1. Are you utilizing the project sponsor field in the overview section of projects? If not, this would be ideal. Anytime a project is opened for someone, the person is for is listed as the sponsor. Then you can pull a project report grouped by sponsor to see not only who had projects created for them, but how many.
2. Create a project custom form field that is attached to all projects where the name is entered there. Same thing as above on how this can be used in a project report. If you’re not already using sponsor, that is easier.