There are only two simple capabilities for the Flashcard module.
mod/flashcard:manage
This capability is used for dissociating the teacher role from the flashcard user role. This capability controls the access to the editing screen for modifying the card set, and will also give access to the activity summary board.
mod/flashcard:canplayfree
This capability may be overridden in each instance so that a user is allowed to use the card set in “freeplay” mode. When prevented or prohibited, only the Leitner mode can be used.