Hi Soumick,
You can try by creating 2 roles as given below.
Role A - Tcode Migo
BWART - 313 and 315
for object M_MSEG_LGO field LGORT - give only A
Role B - Tcode Migo
BWART - 314 and 316
for object M_MSEG_LGO field LGORT - give only B
Try assigning both the roles to user and see... Not 100% sure...but u can try out.... You need to have such scenarios tested very thoroughly.
With Regards
Nishad Showkath