I agree with @JessicaDeanSVC that there is no built-in way to do this in Canvas. You *might* be able to do some customizations via theme javascript/css, but that gets into "unsupported" territory and you would have to consider scenarios like Jessica brought up where users may have multiple roles in different courses or no roles at all and how you'd want to handle those. I'm mentioning this as a possibility, but it's a road that many schools/institutions will not go down because of the support headache these sorts of customizations can become as Canvas is a constantly evolving platform.
-Chris