You can use a custom-made snippet (it’s always an option)

.
but, you can also try using
IF Package/Snippet in Repo. :
http://modxcms.com/extras/package/600
IF Documentation:
http://rtfm.modx.com/display/ADDON/If
Use the IF snippet in the Tpl(Template-Chunk) to compare The TV you have been set before and assigned to your resources.
And that’s how you can conditionally choose if to output the [[+wf.link]] PlaceHolder and generate the link depending on your choice over the TV.
You wiil need to get the TV’s per resources in the Tpl for the comparison,
I don’t have much experience using
Template-Variables in Wayfiner’s Template-Chunks
(as TV-PlaceHolders(?),
but it’s can be good solution.
if it’s to much truble for you going on with the TV’s in wayfinder, you can use
getResourceField to retrive the TV you need for the comparison.