It would be interesting if ethics/laws could be applied differently depending on an individual's caste, species, or position within or without an entity. Like nobles being able to ctake objects they desire from non-nobles without compensation, or having the option to challenge those of equal or standing to a duel if insulted, but not those of higher status. Things like that would be neat, and could lead to interesting situations:
A tantruming dwarf assaults another dwarf, but since the first dwarf was a noble, it is not treated as a crime.
Your legendary mason feels insulted by something a visiting human traveler says in the tavern, and she promptly breaks his leg. This is completely legal by Dwarven law as the assaulted is viewed as a crude barbarian and not entitled to demand justice. But next summer the human diplomat arrives and demands justice for this crime....perhaps attacking a visitor, particularly one who has been given food under ones roof-is seen as a heinous crime by the human nation, a crime that demands the exile of the offender. The player would have the option of accepting the diplomat's demands and exiling the mason, suggest a middle ground where the crime is treated as if both parties were dwarves, or refusing outright.
For another example, an elven caravan guard sees a nice *bismuth bronze short sword* and tries to walk off with it but is caught and confronted. Among the elves this might be cause by a stern talking to by their elder, and the return of the object and compensation of equivalent value. But the player, having caught the offending elf could choose to let them go and trust that compensation and an apology would arrive, or choose to administer a traditional 'dwarven' punishment where stealing from any dwarf by an outsider is seen as stealing from the group as a whole instead of an individual and punished harshly.
I'm hoping situations like this will emerge organically as diplomcy gets fleshed out further down the line, but it's interesting and exciting to think of situations where ethics and laws might be treated differently depending on the parties involved.