We added custom fields to our Redmine such as "Implementer".
When an Implementer completed the ticket, it goes to validation and the Assignee changes to the QA person, but on the Sprint board we want to keep track of all the implementers tasks.
However, we cannot pick "Implementer" on the Swimlane drop-down, only Assignee.
Please add Custom Fields with Format = List to the Swimlane options too.