What determines when a project is active in my session?
Your project is active when you see the project in your  under Projects section. 
Additionally, you can see the   project tag of the projects when you satisfy the security restrictions for those projects.
If you do not satisfy the security requirements for a project, you will see the   lock tag on it and will not be able to access it. 
tip
It is helpful to deactivate unused projects at a broader scale for security good practice.
info
All current Virtual machines will be restricted to the project that they are tagged with.
