Civil Engineering in Australia

No, they do not provide lateral entry. You have to start from first year itself to study there. Good luck.

You should take GRE exam and score good marks in the same. GRE scores are needed for MS.

Hi Sonam Zangpo,
First, check university websites to get an idea of the admission requirements, deadlines, fee, etc. As an international applicant, you must also prepare and take the IELTS to meet the English language requirements. Different universities have different IELTS score requirements. You must also have good academic grades. It is also best to contact the universities directly before you apply. Check here:
https://studyabroad.shiksha.com/australia/be-btech-colleges-dc

Dear Krishna,
You can check out RMIT, Deakin University and The University of Sydney among few others.
All the best.