GeoAnalytics Server internally uses an access system based on access rights for services that can be assigned to a user. An access right givs a user the right to use a single service. Services are things like getting map tiles, map configurations, name lookups. A multi-alias is a set of access rights so that a user can be assigned the right to use multiple services at ones instead of having to assign each service one at a time.
All Qlik users of the map chart run as a single GeoAnalytics user against GeoAnalytics Server in an installation. In the data package there are configuration files included to set up the necessary access rights for the services that the map chart user needs.
For GeoAnalytics extensions and connector another access system is used based on Qlik license serials.