that concerns the whole Softimage community here as well, mentioning it on the Mailing List only...
(Quoted from here)Here is a link to Softimage Alembic Plug-In with added selective import feature:
https://sourceforge.net/projects/softim ... ic-plugin/
You can choose to import the whole Alembic file or to import only certain objects from the file. You can also choose to target an Alembic object to be imported to an existing object in the scene. There is no change in export mechanism.