According to this, the answer is yes (found by searching for "Tableau UNC" via Google)
From the link above:
A URL action is a hyperlink that points to an external file, web page, or other web-based resource outside of Tableau. When using a hyperlink from a workbook to point to an external file, use the full universal naming convention (UNC) path for the URL action. A UNC path is the full path of a resource or file that is stored on the machine, which includes the full computer name, drive, path to the file, and file name. For example, a text file with a path to
D:\datasource.txthas a UNC path that looks like the following:
\\workstation1\d$\datasource.txt, where"workstation1" is the full computer name.
Note: For other users to be able to access the external file from a published workbook, the Tableau Service account must have access to the file location.