The only way for another user account to access a User Defined Batch Process is for the first user to export the preset and the second user to import. This can only be done on a single preset basis.
It would be useful to be able to export all Batch Presets together in a similar manner to using the Layout Editor; here one can export all available layouts simultaneously.
A selection using CRTL and/or SHIFT could be considered as a further refinement of selection
Aubrey.