Not really, as Tata sponsor and carry out CFD work for Hispania (and Ferrari before that), I don't really consider that manufacturer support.
Paying for/supplying engines doesn't really count in my opinion. Not unless said manufacturer is pouring quite a bit of money into developing the engines or supporting the team.
Just like supplying a car isn't really "manufacturer support" either like in GT, Rally or Touring Cars.
The same goes for ordinary sponsorship - Lotus Cars sponsor KV Racing in Indycar. Is this manufacturer backing? Not really, its just sponsorship, they don't own the team or supply anything different to anyone else.
There is a relationship there, quite obviously, but its not at a point we can really call it manufacturer backing.