Tckgen -seed N-ary mask

Good day,

I’ve created a single nifti image with 9 spherical ROIS (N-ary image).
Each of the sphere has a different value.
1st sphere =1 , second sphere = 2 and so on…

Is there an option in the `tckgen -seed_image image command to enable tracking from sphere1 to sphere2 within that single nifti file?

Thank you very much for your help.