I have found a work around. PYTHON saved the day again. Something like the following.
# Import Modules
import arcpy, os
# Set Variables
mxdpath = r'FULL PATH TO MXD FILE' # string
outputfolder = 'FULL PATH TO OUTPUT FOLDER' # string
namefield = 'THE FIELD CONTAINING THE NAME OF THE RESULTING PDF FILE' # string
queryfield = 'THE FIELD CONTAINING THE VALUE FOR THE DESIRED QUERY' # string
layers = ['LIST','OF','LAYERS'] # list
mxd = arcpy.mapping.MapDocument(mxdpath)
# Start Loop through Data Driven Pages
for pageNum in range(1, mxd.dataDrivenPages.pageCount + 1)
mxd.dataDrivenPages.currentPageID = pageNum # set the current page
pageName = mxd.dataDrivenPages.pageRow.getValue(field) # get the pageName
pageName += '.pdf' # add '.pdf' extension for file name
pdf = os.path.join(outputfolder, pageName) # add pageName to output folder to get full output path
# Start Loop through all layers of mxd file
for lyr in arcpy.mapping.ListLayers(mxd) # for every layer in mxd's Layer List
if lyr.name in layers: # if layer name in user input list above
value = mxd.DataDrivenPages.pageRow.getValue(queryfield) # get the value out of the query field
if lyr.defintionQuery == True: # if a defintionQuery Exsts...
query = lyr.defintionQuery + "AND QueryField = \'%s\'" % (value) # Add the new to the old
else:
query = "QueryField = \'$s\'" % (value) # else create a new query
lyr.defintionQuery = query # set the layers defintionQuery
else:
print 'Next' # else print next, this isn't necassary, but its a good place holder
arcpy.mapping.ExportToPDF(mxd, pdf) # export the current Page to pdf
del mxd, lyr, pageName, pageNum, query, value