Post what you have tried ( see Community Guidelines 9 & 11)
From what you have described, one way to approach it is to have individual triggers for each of the item from the first list. Set the ID of each trigger to match the values in the Input Select, so a simple template condition can reject non-selected triggers:
triggers:
- id: 5PM
trigger: time
at: '17:00:00'
- id: sundown -1 hour
trigger: sun
event: sunset
offset: '-01:00:00'
... more triggers
conditions:
- condition: state
entity_id: input_boolean.automation_moodlight_kitchenwindow_activation
state: 'on'
- condition: template
value_template: "{{ trigger.id == states('input_select.automation_moodlight_kitchenwindow_activation_on') }}"
actions:
....