very basic question about apache and users

hi all -

does apache use the username and groupname that was created by virtualmin as its "login" name?

in other words, say i created a virtual-server named "virtualminIsAwesome.com".

so naturally enough, i see by total magic a directory out there called:

/home/virtualminisawesome.com/public_html/

and if i were to do an ls -l i would even see something like:

drw--rw--rx virtualminisawesome virtualminisawesome 123 public_html/

so is apache sorta like logging in as the user virtualminisawesome when grabbing my html files, running php, etc ?

sorry to ask such stupid basic questions, but this was not covered in my kindergarten class.