How to set up multi-dimensional DUB package configuration?

[Dukc]

Illustration, I want to choose both an edition and marked 
copyright holder:

```
configuration "inhouse" {
     targetType "executable"
     versions "InhouseEdition"
}
configuration "salesmen" {
     targetType "executable"
     versions "SalesmenEdition"
}
configuration "internet" {
     targetType "executable"
     versions "InternetEdition"
}
configuration "copyrightcompanya" {
	versions "CopyrightCompanyA"
}
configuration "copyrightcompanyb" {
	versions "CopyrightCompanyB"
}
```