I am not exactly sure what your question is, but in the IFC Translation Setup Dialog, in the Export Options panel, click the Conversion Options button.
Then in the upcoming Dialog check the Explode Composite and Complex Profile elements into parts checkbox.
When the project is exported, you will be able to select individual skins of Composites and individual components of Complex Profile elements.
Get Archicad Tips at https://twitter.com/laszlonagy
AMD Ryzen 1700X CPU, 48 GB RAM, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), WIN10 PRO ENG, AC20-AC26
Loving Archicad since 1995