This was one of the selling points of the old Windows NT POSIX subsystem (the Interix-derived SFU/SFUA one) over its predecessor. Programs such as "ps" and "kill" can "see" Win32 processes, with POSIX process IDs.
* https://technet.microsoft.com/en-gb/library/bb463219.aspx#EH...
* https://technet.microsoft.com/en-gb/magazine/2005.05.interop...