Is there a statistical software package for the generalized conditional/multinomial logit model?

I have a discrete choice model of moving from one state to the other, so alternatives=states. I have case-specific variables such as income, race, and gender. In addition, I have moving distance variable which varies over alternatives and cases because it depends on residence before moving (varying over cases) and the destination (varying over alternatives). The problem arises from this variable. I checked mlogit and clogit but realized that they do not allow variables which vary over both alternatives and cases. Is there any Matlab package which allows it?