Yes, you can assign people or tasks a project-specific rate. To do that follow these steps:

1. Go to Projects and click the Actions menu to the right of a Time & Materials project you’d like to edit.
2. Select Edit to get to the Project Edit page.
3. Double check that the Billable rates setting has either Person billable rate or Task billable rate selected.
4. Scroll down to the Tasks or Team sections to enter project-specific rates per task or per person, respectively. For person rates, you can learn more about how to change default rates over time and switching between default and custom rates in our article on changing billable rates.
5. Save your changes.