Exclude Group from Frontend Module Access

[tpsupport]

Hi there!

I am looking for a solution to exclude specific group from accessing a Frondend Module. The specific module in my case is "CustomerTicketOverview" and the subaction is "CompanyTickets".
The Syconfig is here: "CustomerFrontend::Navigation###CustomerTicketOverview###002-Ticket".

Under "Group" and "GroupRo" I can add allowed Groups but I just want to exclude one. I guess best would be if a regex "^(?!GroupName).*$" or (probably dirtiest) negate the setting in CustomerTicketOverview.pm but I can't seem to find the setting I would need to modify.

Does anyone know where I have to look at? Thanks!

[tpsupport]

I did not find a way to exclude but a good alternative by creating a group that my customers need to have access permission in this post: viewtopic.php?p=162269.