Specify UserID and GroupID for MacPorts users, how can I do that?

[FritzS GMX]

Which users (and their groups) are created by MacPorts and how can they be created during a new installation so that they get a UID (also GroupID) previously defined by me.
Is there possibly a script suggestion that could be used before the MacPorts installation?

I want to achieve UID's & GroupID's starting from 530.

I want to install MacPorts on my new M1 MacMini with Monterey.

From my old Mac with ElCapitan
# _messagebus 512
# avahi 511
# ldap 500
# macports 506
# messagebus 508
# named 509
# pulse 510

-- 
FritzS 
fritzs at gmx.net