The class action intends to target Arowana, its directors and certain former Intueri directors who promoted the $2.35 per share initial public offering in which about 800 investors participated.
While Arowana has said nothing about this to its shareholders, it did respond to questions from BusinessDesk last year by saying it is "confident that the proposed class action has no prospects of success."
Arowana also accused Adina Thorn of defaming people associated with it.
However, Arowana, which has a market capitalisation of just A$19.8m ($20.6m), its shares having fallen nearly 35 per cent in the last 12 months, may have other troubles.
Another of its former investments, the unlisted public company Evolution Group Holdings, a traffic management company, has suspended interest payments to holders of its A$32m of unsecured bonds.
In December, it was blaming this on rogue former executives but in January it said Australia's bush fires were partly to blame.
The Australian Financial Review reported last month that the loss-making Evolution has been plagued by operational and management challenges since about 20 of its management team left in the wake of a failed management buyout.
Evolution has said it terminated three former executives in June last year for paying themselves unauthorised bonuses, failing to pay tax obligations and non-payment of suppliers.