We work with 2 different suppliers and have projects dedicted to issues for each. Currently, any user from either group can can see all of the users in the system, including users from the other suppliers group, e.g. when assigning a user or using the assignee filter in issue search. Can we prevent these two groups from seeing the other's users? Can we do it so that internal users can still see all users in the system? We have a dedicated project for each supplier and use groups (e.g. internal, supplier 1, supplier 2) and permissions to limit access to the project and issues. So, Project 1 will have permissions that limit browsing projects, creating issues, setting assigness, etc. to the inernal and supplier 1 groups only. The internal group is assigned to th permissions for both Project 1 and Project 2 as well as many other projects.