The Group Filter Consumer plugin will filter the consumption and not perform an action like most of other consumer plugins.
You can select packs and groups ; When a user want to consume a serial from the selected packs, the plugin will check that the user is right in one of the selected groups.
If not, the consumption will be aborded.

That plugin is useful if you generate Gift Certificates because you will be sure that only your managers will be able to consume the serial (the coupon).
The customer could try to scan the QRCode from the attach serial plugin but the serial will stay untouched.

Parameters of the plugin

Name - The name for the consumer. This name is only display in the backend and users won't see it.

Published - Does the plugin instance could be use, or not.

Packs - The packs that you want to filter.

Groups - The authorized groups for the selected packs.