How to set different max transition for the different sub modules in design.

hi,

i want to use set_max_transition to set transition for my design.
but my design hierarchy 

top_design --> 16 slavecontroller -->syn_decoder, level gen, counter
now i want to set max_trans for syn_decoder and counter of 0.3 and for rest of the design as 0.7 how can i do this ?

pls if you can provide me quick help on this.

Regards,
Priyankar