there is a bones node, bone looks at the target always.
I moove the bone on X axle… as i see the bone mooves AND rotates.
All i have is output from the BONE Supports: Matrix Transform

well, for this you should read up on mathematical matrix transformations. unfortunately i do not know which matrices vvvv uses exactly, maybe someone can enlighten us?

translations and rotations can be represented as a 4x4 matrix as explained e.g. here: http://www.euclideanspace.com/maths/geometry/affine/matrix4x4/index.htm
other keywords of interest are: quaternions, affine transformations, homogeneous coordinates. i hope it does not break your brain. ;-)