Yes. I've tried expressions like this one
,if([Markets] ='International ',3
,if([Markets] ='Others',4 ))))
in the sort tab but it doesn't recognize [Markets] as a dimension .
If I put the measure above I'll be sure that the dimension fields will be always as they appear now (by chance, in this case, if I do that it will sort the dimensions as I want, but in other cases it doesn't)