Relationship Help

I am building an app for my tax company. I have 2 groups of users; clients and employees. I need to assign clients to specific employees sometimes more than 2 depending where in the project we are at. The Project has steps 1-7 that the assistant will help the clients complete and at that point will assign the client to an employee to complete the project. Once completed we need client to sign document and add a compliance employee to verify information. I am trying to break it down because all of that just lost me, sorry if that lost you too, any suggestions on relationships and properties will help.