The heart of the module is the list option. This enables you to create tables with custom user fields.
When setting up your module, you first, naturally, have to start with custom user fields. Once they are added, you can display them in the list, combined with Joomla core user fields.
In the module, go to the tab list, and select the fields you want shown. The order is relevant. Optional labels are available for the Joomla Core fields, These labels will be shown als the column identifiers. For the custom fields, the label can be set in Joomla itself.
You can decide not to use the Joomla! fields all together, but you would have to at least have a name or email field added in the custom fields. This would mean that you users will have to enter their name or email twice. Once in the joomla section, and once in the custom field section. But, as shown, you can also simply combine them!