Can i adjust hp loss against salary income of an individual?

Yes, Hp loss can adjust against salary income,even after due date of filing return of income is over. for self occupied property maximum amount of loss deductable (interest on capital borrowed ) 150000 on satisfying certain conditions, in case of let out property there is no limit on interest amount deductable , however if  hp loss exceeds salary income, then carryforward of such excess hp loss to succeeding years is available only on filing of return of income within due date.

Yes agree with Chaitanya.....

Because the losses can be set off against income even if ROI is belated ....the restriction of Sec 80 read with Sec 139(3) is only w.r.t carry forward of loss which could not be set off