kroberts-iMac-8:~ robertdunn imac2$ kextstat grep lima
Extra arguments starting at grep....
usage: kextstat [-a] [-k] [-l] [-b bundle_id] ...

Use kextstat -help (-h) for a list of options.
usage: kextstat [-a] [-k] [-l] [-b bundle_id] ...

Use kextstat -help (-h) for a list of options.
roberts-iMac-8:~ robertdunn imac2$ kextstat | lima
-bash: lima: command not found
roberts-iMac-8:~ robertdunn imac2$

kroberts-iMac-8:~ robertdunn imac2$ kextstat grep lima
Extra arguments starting at grep....
usage: kextstat [-a] [-k] [-l] [-b bundle_id] ...

Use kextstat -help (-h) for a list of options.
usage: kextstat [-a] [-k] [-l] [-b bundle_id] ...

Use kextstat -help (-h) for a list of options.
roberts-iMac-8:~ robertdunn imac2$ kextstat | lima
-bash: lima: command not found
roberts-iMac-8:~ robertdunn imac2$
roberts-iMac-8:~ robertdunn imac2$ mount
/dev/disk0s2 on / (hfs, local, journaled)
devfs on /dev (devfs, local, nobrowse)
map -hosts on /net (autofs, nosuid, automounted, nobrowse)
map auto_home on /home (autofs, automounted, nobrowse)
/dev/disk1s3 on /Volumes/time machine bob (hfs, local, nodev, nosuid, journaled)
/dev/disk1s2 on /Volumes/My Book for Mac (hfs, local, nodev, nosuid, journaled, noowners)
/dev/disk2s2 on /Volumes/Silverlight (hfs, local, nodev, nosuid, read-only, noowners, quarantine, mounted by robertdunn imac2)
roberts-iMac-8:~ robertdunn imac2$

Those are the two responses i got. I just typed 'mount' on the second command, I dont know if that is what you mean or if I should have added kextat as well. If I to that, I get
kroberts-iMac-8:~ robertdunn imac2$ kextstat grep lima
Extra arguments starting at grep....
usage: kextstat [-a] [-k] [-l] [-b bundle_id] ...

Use kextstat -help (-h) for a list of options.
usage: kextstat [-a] [-k] [-l] [-b bundle_id] ...

Use kextstat -help (-h) for a list of options.
roberts-iMac-8:~ robertdunn imac2$ kextstat | lima
-bash: lima: command not found
roberts-iMac-8:~ robertdunn imac2$
roberts-iMac-8:~ robertdunn imac2$ mount
/dev/disk0s2 on / (hfs, local, journaled)
devfs on /dev (devfs, local, nobrowse)
map -hosts on /net (autofs, nosuid, automounted, nobrowse)
map auto_home on /home (autofs, automounted, nobrowse)
/dev/disk1s3 on /Volumes/time machine bob (hfs, local, nodev, nosuid, journaled)
/dev/disk1s2 on /Volumes/My Book for Mac (hfs, local, nodev, nosuid, journaled, noowners)
/dev/disk2s2 on /Volumes/Silverlight (hfs, local, nodev, nosuid, read-only, noowners, quarantine, mounted by robertdunn imac2)
roberts-iMac-8:~ robertdunn imac2$ kextat | mount
-bash: kextat: command not found
/dev/disk0s2 on / (hfs, local, journaled)
devfs on /dev (devfs, local, nobrowse)
map -hosts on /net (autofs, nosuid, automounted, nobrowse)
map auto_home on /home (autofs, automounted, nobrowse)
/dev/disk1s3 on /Volumes/time machine bob (hfs, local, nodev, nosuid, journaled)
/dev/disk1s2 on /Volumes/My Book for Mac (hfs, local, nodev, nosuid, journaled, noowners)
/dev/disk2s2 on /Volumes/Silverlight (hfs, local, nodev, nosuid, read-only, noowners, quarantine, mounted by robertdunn imac2)
roberts-iMac-8:~ robertdunn imac2$

About 'multiple user session,' I don't think so. I have a Imac desktop that I use only. And I'm the administrator. Two other people can use it ad they have their own user pages, but noone uses the same system simultaneously.