As a first step, the "Community Administrator" of your community "IET Pakistan Network" may edit the name of the community by logging into his / her account (admin setting).
It is obvious that you are the Community Admin of the IET Pakistan Network. May i tell you the steps, how to change the name of your community from IET Pakistan Network to IET Karachi Network please.
Start Procedure.
Step 01: Log in to the IET Communities Website.
Step 02: Go to IET Pakistan Network.
Step 03: Click on the "Community Admin" button on the Community Menu at right side.
Step 04: Under "Detail" Tab (already opened), type "IET Karachi Network" under the column of "Community Name".
Step 05: Click the "Save" button beneath the currently opened page.
Step 06: Click on the "My Home" button at the top of the page.
I have discussed said matter in detail with Mr.Robert Allen Community Manager IET UK. He will look into the matter further.
The point was that as you have admitted that IET Pakistan Network is actually IET Karachi Network. Therefore, the links of IET Lahore and IET Islamabad at the main page of IET Pakistan depict and make the perception to general visitor that both both IET Lahore and IET Islamabad are under the umbrella of IET Pakistan (Karachi), hence, make confusion.
Besides of all this systematic point, i hope that we shall cooperate and share our experiences mutually in the best interest of the professions of Science, Engineering and Technology in Pakistan by using the platform of the IET UK.