Not with the bundled script, at least not directly. But:
Theres a volume called “mailcowdockerized_sogo-userdata-backup-vol-1” in which the sogo profiles are backed up atomatically every night (at 2am I think) with sogo-tool.
There’s a file for every user, containing all their stuff (calendars, contacts, folders, rules etc.), except for the mails themselves.
They could be restored individually by connecting to the sogo container and running sogo-tool: http://wiki.sogo.nu/backupRestore
As for the mails, it’s just files in directories in the “mailcowdockerized_vmail-vol-1” volume.
You could extract a user’s directory from the vmail backup file and copy it over to their live mailbox folder.
Take care about permissions though!
You can of course also restore the whole backup to another docker stack on a different machine and then copy/transfer over whatever you need.