Can Dishonorable personalities perform actions from Action cards while in Bayushi Nomen's army?
"Actions performed by Personalities who were dishonorable when the action was announced can not target Nomen or Personalities in Nomen's army."
Bayushi Nomen
A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
Can Dishonorable personalities perform actions from Action cards while in Bayushi Nomen's army?
No. But keep in mind not all actions on action cards are performed -- see the FAQ, http://rules.l5r.com/FAQ#What_performs_an_action.3F.
On: Bayushi Nomen