No first-hand knowledge but was reading of a Lincoln intercepting an American ‘superfortress’ over Truscott airfield in WA after the Monte Bello islands nuclear tests (p 136, “Australia’s Bid for the Atomic Bomb”) - seemingly both collecting samples of the fallout - only one legally.
Many other references to Lincolns in this book including their role in Operation ‘Cumulative’ which, as as I understand it, were trials for the dropping of nuclear weapons