WASHINGTON, D.C. (LNS)- Government officials are getting ready to carry out a sweeping purge oí food stamp rolls and early victims will be college students and commune dweller s. One of the new rules is aimed directly at communes. The rule denles food stamps to any household in which there are persons under 60 years oíd who don't have some kind of "legal relationship" sanctioned by state law to one another. The same rule will also be applied to two unrelated youths - in or out of college - who share an apartment to hold down expenses. ff the Agriculture Department has its say, these proposals will go into effect this summer.