I installed and set up Privatetickets plugin and was able to get the user permission configured but group permissions seem to be having an issue.
I create a user Itest and asssign the following permissions:
Report_view, Ticket_Create, Ticket_modify, ticket_append, Ticket_chgprop, ticket_view, ticket_view_cc, Ticker_view_owner, Ticker_view_reporter, ticket_viewReporter_group
I also added them to the group Test.
I create user2 with the following permissions
Ticket_view, Ticket_view_cc, ticket_view_cc_group, ticket_view_group, ticket_view_owner_group, ticket_view_reporter, ticker_view_reporter_group, report_view
Add this user to group test.
user2 is unable to see tickets created assigned to user ITest or tickets where ITest is in the CC list.