Upon confronting the culprit, who admits to having uploaded a virus to the defense network of the hanar homeworld, Kahje, Bau attempts to block the upload, but is attacked by the hanar's human bodyguard. Shepard may have to choose whether to save Bau's life or stop the virus.
It is, however, possible for both him and Kahje to be saved if Shepard is being helped by Kasumi. If saved, he and his fellow Spectres will join the war effort.
If Kasumi Goto was either not recruited or Shepard did not assist her in infiltrating Donovan Hock's vault (irrespective of whether she survived the suicide mission), then Jondum Bau gets the information by paying off Donovan Hock instead. If Commander Shepard was never involved with Kasumi or Hock, then Bau just mentions getting an anonymous tip.
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- Mass Effect writer Patrick Weekes named Jondum Bau after his colleague, John Dombrow. Dombrow had previously named the character Padok Wiks after Weekes.