The Possessor-Possessum constructions may look like left-dislocations. But the fact that one can get them in subordinated clauses is evidence in favour of a full-fledged possessive construction:
Mon krwar ki lekol son bann laport fodre penn.
1SG think COMP school 3SG.POSS PL door must paint
'I think that all the school doors have to be painted.'
It may be, nevertheless, that this construction type is somehow restricted to the subject position, but more research is needed here.
Source: Bollée 1977: 42, 100
Source: Bollée & Rosalie 1994: 224