Currently, in campaign filters, when a user selects the "User" field, the results are showing all options available in Jeto database even if these campaigns are not accessible to the logged in user. As a result, collaborators will be able to view the name of all Jeto collaborators in the system. These results should only display options that are part of the visible campaigns the user that is performing the search.
We won't be able to include this in the next release, so I'm moving it to Future until we gather more votes.