The tag is present in Lintian version 2.104.234. That is the most recent version we know about.
The menu item is in the FVWM Modules or Window Maker section but does not declare that it needs a specific window manager (using the needs key in the menu file). Modules for Fvwm should have needs="fvwmmodule". Modules for WindowMaker should have needs="wmmaker".