Sue, that list is a great start to Manxmen serving in Australian forces in WW1.
Due to inconsistent metadata there are a lot that don't come up with "Isle of Man" as a search term. (There are a lot under things like "Isle of Mann" or "Peel, England" for example.
I add the following to your list - (I doubt I found them all):
CALEY, Robert Joseph, 1106
CLAQUE, Benjamin, 3784 85692
COOK, Charles Cecil, 242
CORKHILL, John William, 9707
CORKISH, Oliver Andrew, 4157
CORKISH, Thomas, 527
CORNISH, Thomas, 1675
CROSBIE, Edward, Depot
CURPHY, William Kermode, 7655
CUTHBERTSON, Douglas, 3130
CUTHBERTSON, Harold, 3285
DAWSON, John Rupert, 21333
DOUGHERTY, Albert, 3279
EASTWOOD, George Douglas, 280
ERSON, Edward Francis Chute Leger, 3230
FARAGHER, Edward, 9727
FARAGHER, Joseph Albert, 5697
FILLINGHAM, John, 3457
GATES, John Dixon, 7494
GELL, Thomas Henry, 501
HICKS, William, 5590
HINTON, John Arthur, 6522
KEIG, William Edward, 131
KELLY, Henry Eli, 2694
LACE, Walter Edward Morrison, 6168
McCOROSKIN, Edward, 15936
MILBURN, Frank Muncaster, 123
MYLREA, James, 2955
QUAYLE, Herbert Ernest, 1597
RUTHVEN, Sutherland, 2219
TAYLOR, Arthur Vernon, 6686
WILSON, Thomas George, 521