The simple answer is to use a story variable to track which career the Reader chose, then use that variable later to conditionally show the relevant text.
A more detailed answer:
1. You use the (set:) macro to assign a career related value to a story variable.
Choose a career:
(link: "Bartender")[\
(set: $career to "bartender")\
(go-to: "Name of next passage")\
]
(link: "Cook")[\
(set: $career to "cook")\
(go-to: "Name of next passage")\
]
2. You can use the (if:) macro and the related (else-if:) macro to conditionally do something in a later Passage.
Some common text....
(if: $career is "bartender")[\
Some text only related to the bartender career...
]\
(else-if: $career is "cook")[\
Some text only related to the cook career...
]\
Some more common text....
3. Use same technique as point 2 except to show a career related link instead.
(if: $career is "bartender")[\
[[Next Passage->Continue Bartender story]]
]\
(else-if: $career is "cook")[\
[[Next Passage->Continue Cook story]]
]