Basically its the same application. Sponsor has to submit from 1149 on behalf of the applicant along with any documents that proof financially the sponsor has sufficient funds that can be Sponsor bank Account statement, Salary slips, tax returns, proof of accomodation etc.
Below are the docs that can be provided by sponsor.
Invitation letter from sponsor stating
I declare that:
· I will be covering all the costs associated with their stay here in Australia including accommodation, travel and food and have provided the Form 1149 for the visa application
· Applicant will be staying with me for the duration of their stay on the address provided below.
· Sponsor to take full responsibly and assure the department of immigration that applicant will be returning back within the visa validity duration
Enclosing the following documents for your consideration
· Proof of Australian Permanent Resident/Citizenship( Passport, Medicare, Permanent Residency Visa and Driving License)
· Salary Slips, Bank Statement, Tax Return documents and Form 1149
· Proof of Accommodation (Rent Transactions, Utility Bill)
Its more convenient to apply via immi account , the sponsor can submit the sponsored tourist visa through immi account, its all online, applicant only needs to for biometric and medical in Islamabad