Please see for reference
A nonresident is required to file a
Colorado income tax return if they:
• are required to file a federal income
tax return, and
• had taxable Colorado-source income.
COLORADO SOURCE INCOME
Income earned by an individual
while they are not a resident of Colorado will be taxed in Colorado only if it is
considered Colorado-source income and is included in their modified federal adjusted gross income
. For Colorado
purposed, the modified adjusted gross income is the federal adjusted gross income plus or minus some of the
additions and subtractions to federal taxable income
that are reported on the Colorado Form
Modified federal adjusted gross income shall be considered to be Colorado-source if it arises from:
1. a business, trade, profession or occupation carried on in Colorado. This would include the profit from any
business carried-on in Colorado and payments received for work performed in Colorado either as anindependent contractor
or as an employee; or
So based on that determination - wages paid for work activities carried on in Colorado would be classified as income from Colorado sources - subject to Colorado state income tax for nonresidents.
There is no special treatment / exclusion for government employees.
Sorry if you expected differently.