As suggested, this is a very rough summary of the findings of the thread.
Really just the bare bones of it

Roy Robt Walters born 1895 at Port Melbourne,
Father Edwd Walters, Mother Charl Phyllis Roberts.
1918 he married during WW1 in UK to Phyllis Queenie Wilson using his birth name.
Despite documented intentions, never brought her to Aust.
In 1922 Was sought in Qld for unstated reasons under names James Marcus Dodds, James Marcus Roberts, James Marcus Walters.
In 1923 he was listed as a missing person named Roy Robert Walters in Freshwater (either NSW or QLD) Sought by Eileen Walters, her identity unclear.
In 1927 he married to Mary Elizabeth WHITE using the name John Moris DODD.
The following years to 1949 him enlist in the WW2 forces, and see him located as living sometimes with his wife and sometimes elsewhere. She maintained the surname DODD, and settled in Tasmania.
There were 4 children who were surnamed DODD. Certainly one of these Bruce DODD is deceased 1993. The names which OP is seeking are two daughters.
Roy died in 1954.
https://trove.nla.gov.au/newspaper/article/245563470 Sue