There is currently no way in Intuto to give people/colleagues access to just reports within your Intuto site.
The closest that Intuto has for this is to make someone a course contributor.
This will give them access to a report for a course however they can also edit, share and create additional courses as well. They also will not be able to report on collections with this currently.
When someone is a contributor they will have a Report option visible on their Content page.
You can find out how to make someone a contributor here.
Contact firstname.lastname@example.org for more information