Domi returned to Paris Saint Germain after completing a season-long loan spell at Leeds.
The former Newcastle defender impressed in the final few games of the season at United before picking up an injury.
Portsmouth boss Harry Redknapp is looking to add strength to his side and Domi could be a valuable addition to his squad.
Domi is thought to favour staying in England and if a deal can be agreed with PSG he could move to the South Coast.