Not yet, but this is a good idea!
With last beta https://dl.dropboxusercontent.com/u/13064071/plantuml.jar
You can have:
skinparam SwimlaneTitleFontColor red
skinparam SwimlaneTitleFontSize 8
skinparam SwimlaneBorderColor blue
skinparam SwimlaneBorderThickness 5
This beta *should* work with IntelliJ, but you should do a backup before upgrading plantuml.jar
Next official version (V8033) should be published next week. When this will be done, you may suggest IntelliJ team to update their plugin.
Thanks again for your suggestion!