How i can send the same webi report to different users ?

Hi,

i have a webi report with 4 sub reports for the regions, so i want to schedule the report to send the sub 4 reports for 4 users and each user receive the only report for his region, i tried to make it through publication but i see that i need 4 publication for each sub report, so is there any other way to make it in the same publication ?