Yes, if you have a demat + trading + bank account, you are eligible to place IPO applications with ASBA. In this process, you simply have to log in to your internet banking account, search for the IPO option, and submit bid in your choice of IPO.
Once bid get placed, the IPO application amount will get blocked in your account till allotment finalizes by registrar. In case of successful allotment, blocked amount will be deducted otherwise unfreeze to your account. You can now use these funds for any purpose.