How could I use/setup piwik zu make it possible to filter the visits of visitor groups e.g. the visits of visitors of a forum who have POSTED (not visited) in 2 special topics?
Is using “custom variables” (Custom Variables Analytics - Analytics Platform - Matomo) the right way?
But then I have to assign to every vistor all the topic IDs/names he posted in?
(in custom variables I only seem to have 200 characters…)
or is this special case not possible yet?