Partition as Acivity Attribute

In UML 2.5.1 it is described that you can model the activities partition as attribute on the Action. The swinlane representation seems the be just the alternative way.

In VP there seems only to be the swimlane representation.
How can I model an activities partition as attribute in VP?

Screenshot from the UML documentation:

Dear fzedler,

Thank you for your post. Currently, we do not support modeling partition as an attribute of action. I am going to forward your request to our team for a further feasibility study.

Best regards,
Jick Yeung