From: Shona, Southern Africa
Source: Shona (Zimbabwe) proverb (tsumo); ZimbOriginal (zimboriginal.com/tsumo), which translates it "Outside his father's territory, the son of a chief is a servant", and African Manners, "Shona Proverbs (248 in total)", which gives "The son of a chief is a subject elsewhere". Earlier recorded here as also documented by Right for Education; its Chishona proverbs page, read directly, does not contain it.
The source explains it: When one is outside the boundaries of their authority or privilege, they should not feel entitled to, or expect the same treatment as that received within these boundaries.
. The wording of the meaning is ours.