We don't have much experience with published apps.
The PDF24 Creator have to be installed on a local machine. Then the local user have a PDF printer.
This printer can be shared in a citrix environment. e. g. you can install a user printer into an erp application so that the user can print out of the application to his local pdf printer to create PDF files.
The pdf printer on each user account can be shared between any user in the envoronment.
It can only be printed to a machine where the pdf printer is installed. You have to distribute the app to clients.