Once you create your project you may want your project team to be able to see that project. For that, you need to create tasks in the project and assign users to the task. Please click here to read about how to assign users to tasks. When you assign people to tasks, they automatically become a part of your project team and can view the project. When they log into Celoxis, on their dashboard they can see a report called Who's doing what? The tasks assigned to them will show up under that report.
Please look at the image below. When a person logs into Celoxis, they see 2 reports on their dashboard - Projects managed by Me (projects where they are PM) and Who's doing what? (tasks assigned to them and others).