We Use EDS during scanning to get a list of available branches a user can send a batch to, this is based off of active directory, so your idea of getting that list should be possible. depending on how that name is formatted you may be able to go one step further and rather than adding a custom column just set the task operator to that user at your profile step, though i am not sure if setting an operator will be retained from completion of the rulerunner step to start of verify.
Its also possible to do batch role level security on a doc, depending on the the amount of users, you may just be able to put each user in their own role, assign the batch to that role, and then only that user would see the batch. though that sounds like a pain to maintain to be honest
#IBMDatacap#Support#SupportMigration