I would suggest you look at the Serial Splitter Mobile software by Eltima: http://www.eltima.com/products/serial-splitter-mobile/
It can allow share real serial port between several applications devices in away that all applications will receive same data from one serial port simultaneously.
To download free trial version of Serial Splitter please visit:
The bundle which you have to create is:
IN: COM4 (real)
OUT: COM1 (real)