Look in my poweruser package, it has that. https://forum.sublimetext.com/t/poweruser-package-for-power-users/227/1
Basically u go to the spot you want, "store" selection, goto next, "store", and so on... obviously this is only useful if multiple selection are not in the same column, if not use ctrl+alt+up/down OR in my package too courtesy of sublimator it has automatically select columns...
OR , use MultiSelect package from sublimator (dedicated to multiple selections), freaking awesome , basically allows u to have sticky multiple selections and if u need to u can jump back and forth between selections and at same time u can even modify the buffer. bitbucket.org/sublimator/multiselect/wiki/Home
...Gosh I really need to screencast poweruser package features >.<