From the Hawthorn FC website:
Full list of AFL-listed Hawks who are eligible for VFL finals
Harry Morrison ^
Conor Glass ^
Ryan Schoenmakers ^
Harrison Jones ^
^ Currently on injured list
Rules for participation in VFL Finals Series matches
(a) A Player who has not played in at least one AFL or VFL Senior Grade Home and Away Match in the relevant season will be ineligible to play in the VFL Senior Grade Finals Series.
(b) A Player who has played in an AFL Home and Away Match after 1 July in the relevant season will be ineligible to play in VFL Senior Grade Finals Series Matches unless that Player has played in a combined total of at least six (6) VFL Senior Grade Home and Away Matches in the same season.
(c) Despite any other provision of this Rule 20, but subject to Rule 20(d), where a Club has both its AFL and VFL Senior Teams engaged on the same weekend, any Player may be selected to play in the VFL Senior Team so long as that Player has played in at least one AFL or VFL Senior Grade Home and Away Match in that relevant season.
(d) When an AFL Club is eliminated from the AFL Final Series on the same weekend as the VFL Grand Final, the selection of players in the VFL Senior Grade team shall be unrestricted, provided the player has participated in at least one (AFL or VFL) Senior Grade match in the relevant season.