Banking in Pakistan (Karachi)

Hi All,

I will soon be moving to Pakistan from Saudi and need some banking information. I looked on the internet but couldn't find any good answers to my questions so I hope someone out there can help.
I will get paid in USD and my employer will deposit my salary in Standard Chartered Bank. I will then have to transfer money from this account back to my US account to pay some online bills etc.
Is there any restrictions on the amount of money I can send home or the number of times I can transfer money in a month, also will there be Pakistan taxes levied on the transferred money?
Thanks
Rodney