You can create workaround this but not totally what you want. on my personal knowledge in zammad.
In trigger you can set
Action is updated
State is closed
Execute changes on obejcts
Article - Notes
Set to public and create subject
at the note type what you want to appear in ticket you can type the name of the person but you need to create different trigger each person hhehe and is not good…
I also want to do that but the test module is not supported in trigger or at the backend
because if the test module is supported in trigger you can achieve what you want using ::owner first name
Text Modules are not available within the Backend.
The :: functionality in the backend changes from Text Modules to available system variables of Zammad.
Personally I think -if you need to use text module text within triggers- the better way would be to copy the text modules content into the trigger. I mean the text module shouldn’t change too often, right? :-X