In Version 2.107.2 it was possible to add rights to the matrix based security by having static variables in an own plugin.

We now switched to 2.138.3 / 2.150. Now the permission we added ist no longer visible in the matrix-based security. To make it worse, on update of one Jenkins instance the config-file couldn't be read on startup anymore so we had to get an old configuration from history.

This is where I got the idea to do it like this:

https://stackoverflow.com/questions/39216636/how-to-add-column-in-project-based-matrix-authorization-strategy