Dragonboat is integrated with Jira via the Jira oAuth API. You may see more detailed Jira documentation here.
After the Dragonboat account is linked with the Jira instance, each Dragonboat user still needs to confirm their connection between their Dragonboat user with their Jira user. So all actions can be authenticated correctly between the 2 systems.
The user access within Jira will be determined by this user's Jira access level. If this user can't map his or her Jira account with Dragonboat user account, s/he will not have the ability to perform any of the following.
Note - your Dragonboat admin may have renamed Dragonboat idea to a different term - you may tell so by looking for the Idea menu on the top.