How should a Citrix Engineer configure a hosted application so that only a subset of users within an existing Delivery Group are able to access the hosted application?

The 'Prefer' keyword is used in application assignment to prioritize which Delivery Group serves an application when multiple groups are capable, not to restrict visibility to a subset of users.

The 'Limit Visibility' setting on an application in Citrix Studio allows the administrator to specify individual users or groups who can see and access that application, even when the Delivery Group contains a broader set of users. This provides granular application-level access control without requiring separate Delivery Groups for each subset of users.

HDX policies control session settings such as display, bandwidth, and redirection features; they do not control whether a user can see or launch a specific application.

Publishing the application 'to only the subset of users' describes the outcome, but the mechanism to achieve this in XenDesktop Studio is specifically the Limit Visibility setting, not a separate publish action.