I assume that you wish for a "white" stain on unfinished wood, which shows the grain of the wood through the color?
There are a couple of ways to accomplish this. One is to buy a premade finish, which can be hard to find, the other is to buy a white, oil based primer, and thin it with mineral spirits, and add some "white", K-1 grade kerosene (be sparing with this stuff, it's easy to get too much)to extend the working time. Test your color on a peice of scrap before you apply to your wood. Apply like a stain and wipe off the excess with a lint free rag. After two days of dry time, follow with 2 coats of polyurethane, sanding with fine sandpaper between coats and removing all the dust with a tackrag.