Firstly, AFAIK there is no direct way of obtaining one's own owner ID, which consists of the security profile name + some kind of user id. If I want to add properties on file upload, add an own property, list own properties and delete own properties, the owner is always needed as a parameter. But this does not make any sense at all. Since there is an access restriction on write and read (!) of other apps' properties, there is really no necessity that the owner ID must be a parameter. Please change this.