I must kind of registration during my website (companies and job searchers) I wish to hide some modules on (joob searchers) type

however in the access kind of my template joomla i've 3 type (public register special) and administration panel user groupe i cant discover the 2 kinds of registration (companies &lifier job searchers)

i fond this Access Control Levels in this website http://help.joomla.org/content/view/228/153/1/2/

How do i make use of this 2 kind of registration within an access type ??

or

How to produce a new 2 user groups (companies &lifier job searchers) in joomla 1.5 ??