Tags for vision and perspective both exist now.
There's already a Perspective tag in the forum. Have you tried adding a Vision tag? I don't think that requires admin powers, but if it does, let us know.
@Kathy A.: HI Kathy, apologies yes there does look like there's a perspective tag (not sure why I didn't find it before...), but there doesn't seem to be one for vision (see screenshot) Cheers
@nick.minchin: If you hit that + sign on the right side of the input box you should be able to add the tags you want.