as per qatar labour law as follow:

Sponsorship

Foreigners may work in Qatar under sponsorship.

Without special permission, a sponsored employee may not work for another employer. Transfer of sponsorship may be granted in cases where both the original and potential new employers agree to the change. Without a release letter, a person must leave the country for a minimum of two years before returning to work for another employer.

Sponsors may not keep the passports of their employees except to complete visa formalities.

Sponsored employees may apply to bring their spouses and children to Qatar under personal sponsorship

hope u got right clarification from above.....

Have a good Day.....