section 54 - sale of multiple houses and new house registration

dear all,
hv 2 queries regarding section 54 of income tax act
1. if a person sells two individual residential house properties in the same year, can he get capital gain exemption for section 54 separately for two properties? ie cn he invest in one house each against each of the house sold
2. not with regard to the above case, in general can assessee claim exemption under section 54 by buying a home under a close relative name.....? is it allowed under the act?
pls throw some light on the above issues