No, the unit must follow the movement rules.
also this exact question is on the
CSM FAQ:
here is the FAQ main page
And the exact question:
Q. Can you use Lash of Submission to move models
around within a unit and re-arrange them? Can models
be moved out of unit coherency? Can a unit be moved
out of combat? If a unit is moved into dangerous
terrain, do they have to test? If jump infantry are
moved, are they assumed to be using their packs or
walking? Can a unit be shoved right off the table, or
into impassable terrain?
A. The move created by this power is executed exactly
like a normal move, except that it’s not slowed by
difficult terrain. It follows that, for example:
• the 2D6" distance rolled is the unit’s maximum
move, as normal, and models in the unit can move up to
that distance or less.
• models cannot be moved out of coherency.
• units cannot be moved out of combat.
• dangerous terrain tests must be taken as
normal.
• jump infantry may choose to move either with
their packs or on foot (moving player’s choice).
• units cannot enter impassable terrain, leave the
table or be moved closer than 1" to enemy models.