User's permissions in a project always override user's permissions in a portfolio and in a role. To view or change user's permissions in a specific project:
- In Activity Center, click the project to open project details,
- Click on the user name in the Members section,
- Set the required permissions and click 'Save'.
If you want to change a user's role in the project altogether use the same steps as above and choose a required role in the "Role for this project" drop-down list then click on the "Save" button.