Validation of a constant in Dropdown

I have a dropdown in which the values are called from a constant. Will it be possible to customize which items will only come out?

Let's say the status of the request is cancelled, then I should only cancelled in the dropdown. Then if the status is reviewing, I should only see reviewing and revising. etc

Dropdown:

Constant:

Code for Reference:

a!dropdownField(
label: "Request Approval",
labelPosition: "ABOVE",
placeholder: "--- Select a Value ---",
choiceLabels: cons!CRP_REVIEWSTATUS_LIST,
choiceValues: cons!CRP_REVIEWSTATUS_LIST,
value: ri!review.reviewStatus,
saveInto: ri!review.reviewStatus,
searchDisplay: "AUTO",
required: false,
validations: {}
)

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