While what Silvermermaid says is true, it's kinda unfortunate I think. Someone who is a good modeller in Rhino for example would probably be up-to-spec for the company but rejected purely on the basis that they don't have Maya or 3DS Max on their resume. Someone who is making textures for Poser with Photoshop might get turned down even though the company uses Photoshop to make their textures for Softimage.

On the other hand, the good thing is that lower end software is starting to gain more respect in the industry. 3DS Max and LightWave never used to be considered for studio projects, but with their latest advancements, 3DS Max and LightWave (the mid-range apps) are now being used in Television and Feature films. Maya and Softimage are starting to shake in their boots and lowering their prices.