Content access rights setting

We have 2 departments using Catia 19x OP and i want to ensure they can't export each other content. So far they are all leaders in their separate collab spaces and Reader in each other. Department 1 users are leaders in department one collab space & Readers in Department 2 collab space. Issue is they can export Deparment 2 content even though they are readers in Department 2 Collab space. Can we limit this?