We have "infrastructure" as a field for a process since it is a mandatory field in the old EcoSpold1 format, but actually do not use it. Personally I find this decision of a process being infrastructure or not somehow arbitrary, it is at least case study dependent, and thus not really suitable to be set throughout the entire database. For a case study, this would be possible via a parameter of course. Maybe others can respond here, would this be interesting to have?
Thank you,
Andreas