For the case of people with intellectual capacity without damage, can perform jobs of low risk, like offices, crafts, jobs, of preference that are not of foot, not driving vehicles.
For the case of people with intellectual disabilities, it is not possible to work (usually); however, in some cases, can make handicrafts or work without any risk, such as orchards and vegetables and then help selling your products; painting, music, and other, provided they do not generate any risk to their physical integrity, taking care of the appropriate safety measures.