So, the client has several users who each need to send requests, and they also need users to be able to see/process each other's requests.
First of all, every contact person affiliated with a customer may be given access credentials to Client Portal. The access needs to be enabled on Account Data tab in the contact's profile by checking Client Portal Access Allowed box.
Then, in the Manage section, there are 4 options when it comes to the scope of offices (from just the quotes/projects they were assigned to to all the quotes/projects in the whole organization). Plus, they may be given/taken rights to accept/reject quotes from CP.
Customer support service by UserEcho