There are a few things you can do. First, I suggest specifying more users within Clarizen and providing licenses depending on need. If they are for email only, then you can create them as Email Only users so that they can update their progress through email Progress templates that automatically update Tasks without logging in.
As for the PC issue, You can technically have a Project Manager AND a Manager on a Project if that helps and then you can email the daily notification from Clarizen accordingly. You can also create a Custom workflow rule or custom action that sends a email or report to your PC (project Manager), Manager, Resources or any other User in the system you choose, as well as external emails as well.
For customizations help, please take a look at our documentation first...
For further clarification, we suggest you register for one of our Advanced Q&A webinars (see the link-> http://www.clarizen.com/resources/online-demo.html#second ).These are great resources for free consulting with our Customer Success Managers and visual answers to your questions. One of our experts will be able to explain it in detail in a much faster manner.