Its mostly about the master feeder structure, other times about a sandwich, learn about those
You have a feeder for domestic tax persons, and a feeder for non-domestic tax persons and domestic tax exempt persons
Its usually dumb and pointless to have non-domestic tax persons to use your domestic feeder, because the regulations are poorly thought out and counterproductive and actually serve no purpose.
all feeders are partnerships or limited by shares, and send capital to the master entity which does the trading
the difficulty is that comparison is not just about the US or insulting any one country, many old world countries have withholding done on investment-in which even US people would find absurd. or the accredited investor requirements are much lower.
The attentiveness and accessibility of the regulators is a boon.
Dunno where to start but I hope that inspired on the depth of how deep to look. Its a great financial center.