Hi,
I do not think there is direct way to find out the DSO used in which trasformation.But You can followthe following steps you will get the information
1)execute following table with blank.
RSAABAP
2) find your DSo with /BIc ie your active DSO table name.
here you will find the DSO in ABAP code then take code ID
3)provide to the table RSTRAN in start routine or endroutine or global then you will find the transformation name.
Follow the steps you will get the information you want.
hope it will resolve your issue.
Regards,
Ganesh Bothe