So far looks one workplace is able to publish one App only. If one workplace supports publishing multiple Apps, so that users can trim the objects of the workplace to publish to different Apps. For example,
There are 20 Dashboards, 50 reports, and 3 Datasets in a Workplace,
separated in Dashboards 1~15
separated in Dashbaords 10~20
separated in Dashbaords 1~20
Then users can publish multiple Apps with respectively dedicated object sets.