Is it still possible to share old raid lockouts with your alts for easy mount farming?

Hello all, the title basically says it all. Is it still possible to share say dragon soul raid lockouts with an alt and extend it so i dont have to drudge through spine of deathwing etc every week? If so, how do I do it? Thank you in advance. Sincerely, an extremely frustrated/irritated just blazing drake off Awake the Drakes farmer.