Hi there,
Yes! Place your pm_static.yml and overlay.conf inside a boards/your_board_name/ folder within your project. Zephyr will use them only when building that board.
Or use the -- -DPM_STATIC_YML_FILE=... method to explicitly include it per build. see nordic video. 
If you’re using multiple boards in a single project, you can create a folder like:
your_project/
├── boards/
│ ├── your_board_name/
│ │ ├── pm_static.yml
│ │ ├── overlay.conf
│ │ └── board.cmake (optional)
├── src/
│ └── main.c
├── CMakeLists.txt
└── prj.conf
this was how I learned to set it up from the mustache man at nordic 
HTH
GL 
PJ 