Acts 2:4

I see a difference in "indwelling" and "filling" of Holy Spirit.

Indwelling is permanent and is the pledge/promise of God that everything spoken by Christ and His apostles will come to past.

Filling is part of God's enabling grace that supernaturally enables believers to accomplish God's purposes through the power of Holy Spirit. Filling, then, can be a temporary enablement for a specific event (Pentecost) or long-term enablement such as God's grace being sufficient for Paul's on-going "thorn in the flesh" (power is perfected in weakness')

IMHO

peace to youraying:

 

These all refer to the same thing in respect of the Holy Spirit:

1. Fell (Acts 10:44)
2. Poured (Acts 10:45)
3. Indwelt (Acts 10:45)*
3. Received (Acts 10:47)
4. Baptized (Acts 11:16)
5. Given (Acts 11:17)
6. Filled (Acts 11:17)*

I put a * next to indwelt and filled. In Acts 10:45 they received the gift of the Holy Spirit. Just as those in Acts 2:4 were indwelt with the Holy Spirit at that time so too now are these Gentiles in Acts 10:45. In Acts 11:17 Peter describes it as the "same gift". Those in Acts 2:4 were filled with the Holy Spirit (cf. Acts 1:5) so too now are these Gentiles.

Mounce - Even after people are permanently filled with the Spirit at conversion, the Spirit can again fill them in a sense that he possesses and empowers them in a special way for a temporary, specific ask, such as when Peter spoke to the Sanhedrin (Acts 4:8) and the church prayed for boldness (4:31). Paul is filled with the Spirit (9:17) and almost immediately begins to testify (9:20). He is later filled with the Spirit again and denounces Elymas the magician (13:9) (Mounce's Complete Expositry Dictionary of Old and New Testament Words, fill, page 250).