MOKSHA....

Only when Moksha happens, then one is liberated from birth and death and he will not come back in physical body again in another birth. If he comes back in physical body again in next birth, then he is not liberated yet from birth and death.

Yes, in the same physical body if Moksha has happened to him, he will stay in that physical body, as this will be his last one and he will radiate his energy to others.

But till one has not get Moksha, he'll have to come back again in physical body because he has still ego left with him and that cleansing process has to be completed....

Before Moksha happens, karma continues on...actions and reactions continue on........