Where will these attachments / content being showed? In Event Description ? Or In a Joomla article ?
I think you can use the plugin
Content - Events Booking Content Restriction. Below are the feature mentioned in the release announcement:
We added new plugin which called Content - Events Booking Content Restriction to allow restricting access to part of content/text in a Joomla article or in the description of the event. Sometime, you might want to allow registrants of an event to access to certain resources (for example, download some documents), and this plugin can be helpful. You can add download link to description of the event, and use the plugin to hide that links/text to none-registrants. Just publish the plugin , and use the syntax
{ebrestriction ids="ID_OF_THE_EVENTS"}The text you want to restrict access here{/ebrestriction}
on any places you want
Regards,
Tuan
