I used to hold a senior position in a Group of Eight university in Australia. At my old university, conjoint appointments ranged from Lecturer (Level B) to Professor (Level E). Conjoint appointments were not allowed at Associate Lecturer (Level A) level.
In return for the appointment, conjoints were expected to fill roles as negotiated by the Head of Department. They were paid a specific rate for their time, but this was NOT a regular salary; they were contractual employees. Some provided lectures or workshops or seminars, others were tutors, yet others supervised students on placement, others were "prestige" conjoints who featured on websites and other marketing material like prized chooks on display.
All conjoints received an email account, library access, facilities access (such as the gym or childcare), and (perhaps most importantly) has some limited parking privileges.
I hope this helps.
*Edited to correct pesky typos.