For the 3 and 4 engined aircraft that I've operated, symmetric 2 engine taxy in was a normal SOP, provided that the good caution mentioned by
eyeinthesky is observed with respect to hydraulic systems.
Interesting to note that
Aussie mentions that they don't do this in Australia, TAA/Australian Airlines DID single engined taxy in for the DC9 aircraft some 20 or so years ago, saving about 30 Lb of fuel per sector.
The DC9 and it's family, of course, have fuselage mounted engines, making little difficulty in a tight turn into the live engine, a different matter altogether for 2 engined aircraft with wing mounted engines (I've been caught in this situation in an F27).
Regards,
Old Smokey