First post! Big whoop! However...
There is probably another Edwin Moses who is Australian. The great hurdler Edwin Moses was an American from Ohio. He was born on August 31, 1955.
He would not have been a director/production manager/composer for any Australian documentaries/films in 1971=1972. The wrong nationality and he was too young.
https://www.imdb.com/name/nm2845831/
Clearly a case of mistaken identity.
IMDB is WRONG.