hmm i dont think so but wot u can try if u want to move a big part of your map or a building make a brush covering the hole building then go to Selection then down to Select Complete Tall it will select all wot was inside that brush & some that arnt just deselect tham have a playaround with it BUT make sure u SAVE your map be for you do this ..
Easy way to do that is just draw a brush around all that you want to move, doesn't matter what tex you use, then right click and hit "Select Inside". It will select everything that was covered and you can move it by click and drag.